Hi there,

Bug score is a metric that combines the following metrics:
Votes Weight:
See Also Weight:
Duplicates Weight:
Comments Weight:
CCs Weight:
Bug Type Filter:
Component Filter: Geckoview or Fenix
Threshold score: 20
Bug Summary Product Type Creation Bug Score Severity Duplicates Votes CC See Also # of comments
117222 Limit Scope of Session Cookies (new tabs and windows) Core / Security enhancement 22 years N/A 120 114 224 0 329
1378651 Allow accessing back-forward history for each tab WebExtensions / General enhancement 6 years S3 3 574 84 4 34
1413525 Implement a general mechanism for saving sessions WebExtensions / General enhancement 6 years S3 0 556 78 2 59
1381922 Allow modifying/restoring back-forward history for each tab WebExtensions / General enhancement 6 years S3 0 567 79 3 29
1332447 API to hide the tabstrip WebExtensions / Frontend enhancement 7 years S3 5 304 241 0 193
18808 New windows/tabs should inherit current page, back button/go menu history Core / DOM: Navigation enhancement 24 years S3 46 198 145 0 247
1235231 Sessions restore windows in random order Firefox / Session Restore defect 8 years S3 4 423 82 3 91
40873 Save as rfc 2557 MHTML; complete webpage in one file Core / DOM: Serializers enhancement 23 years S3 18 276 146 2 184
57342 Add "View as Text/HTML/..." option for unknown mime content-type Firefox / File Handling enhancement 23 years S3 33 185 178 2 225
55696 "Force JavaScript link to open in new window or new tab" Firefox / General enhancement 23 years S3 29 225 130 0 166
1215064 Design and implement an API for Toolbars WebExtensions / Frontend enhancement 8 years S3 4 328 147 1 62
115107 CSS not fixed up by webbrowserpersist ("save page as, complete" omits background images) Firefox / File Handling defect 22 years S4 55 123 150 0 189
444284 Sync search plugins Firefox / Sync enhancement 15 years S3 24 179 189 5 133
17754 Ability to submit form in a new window / tab (when button is middle or right clicked) Core / DOM: Core & HTML enhancement 24 years S3 32 153 134 0 179
1298912 Multiple snapshot: Perform periodic session backup and let the user restore a particular backup Firefox / Session Restore enhancement 7 years S3 1 374 49 0 27
57805 front end for customizing keyboard shortcuts (configurable/user-defined keys) Core / DOM: UI Events & Focus Handling enhancement 23 years S3 32 130 148 4 151
866522 Bookmarklets affected by CSP Core / DOM: Security defect 10 years S3 6 189 181 3 112
469421 Add a folder column to search results for bookmarks in the library Firefox / Bookmarks & History defect 15 years S3 38 111 129 0 161
102695 [EVENTTARG]Treat some transparent elements as "transparent to events" Core / Web Painting defect 22 years S3 74 22 118 1 188
259356 Support for the Freedesktop.org XDG Base Directory Specification Core / XPCOM enhancement 19 years S3 4 108 198 1 181
33654 TEXTAREA incorrectly applying ROWS= and COLS= (horizontal / vertical scrollbar extra space, with overlay scrollbars disabled) Core / Layout: Form Controls defect 23 years S3 27 103 91 1 191
1536482 Web Authentication - Support macOS Touch ID Core / DOM: Web Authentication enhancement 4 years S3 5 178 205 1 55
845820 Ability to (un)check all windows and tabs in about:sessionrerestore Firefox / Session Restore defect 11 years S4 0 343 16 0 3
591957 Add ability to copy URLs of to-be-restored pages in Restore Session Firefox / Session Restore enhancement 13 years S3 0 339 21 0 4
1421673 Make 'Restore Previous Session' an addable toolbar button like 'New Window' or 'Downloads' Firefox / Session Restore enhancement 6 years S3 0 335 17 1 5
1315558 tld service for webextensions WebExtensions / General enhancement 7 years S3 1 278 49 5 27
435013 Cert error "sec_error_reused_issuer_and_serial" (e.g. for Linksys devices) cannot be overridden Core / Security: PSM defect 15 years S3 8 86 92 3 219
1429838 After restoring profile to a different location, paths in extensions.json are incorrect Toolkit / Add-ons Manager defect 6 years S3 10 246 53 2 41
1246236 Implement local filesystem read/write access. WebExtensions / General task 8 years S3 5 164 88 5 118
587400 Closing a pinned-tab less window last removes all pinned tabs Firefox / Tabbed Browser defect 13 years S3 30 67 110 1 166
1421254 setBrowserState seems to ignore selectedWindow property Firefox / Session Restore defect 6 years S3 0 297 23 0 5
441414 Treerows need a way to hold richer content Core / XUL enhancement 15 years S3 1 80 99 0 214
160144 Replace POSTDATA dialog with better UI (post form resubmit warning) Core / DOM: Navigation defect 21 years S3 11 40 62 0 265
126309 save page does not save @import -ed CSS Firefox / File Handling defect 22 years S3 35 115 102 1 80
1576767 [10.15+11] Crash in [@ libsystem_kernel.dylib@0x744e] in mozilla::gl::GLContextCGL::SwapBuffers() Core / Graphics defect 4 years S3 1 3 28 3 354
1650212 Integrate password autofill on macOS Big Sur Toolkit / Password Manager enhancement 3 years N/A 0 214 94 3 42
126379 Select (size=1) onChange not called using down arrow key Core / DOM: UI Events & Focus Handling defect 22 years S3 41 37 77 0 177
12460 Cannot select or edit or search generated content and alt text [GC] Core / DOM: Selection defect 24 years S3 45 60 95 1 120
674925 Improve UI of detaching tabs Firefox / Tabbed Browser enhancement 12 years S3 6 92 151 1 127
275173 CSS3 cursor 'no-drop' is the same as 'not-allowed' Core / Widget defect 19 years S3 0 105 273 1 31
78104 [RFE]block images by directory or by regexp/pattern Core / Graphics: Image Blocking enhancement 22 years S3 27 103 81 0 107
98168 <xsl:text disable-output-escaping="yes"> not working Core / XSLT defect 22 years S3 29 66 66 0 156
354493 Mitigate CSRF attacks against internal networks (block rfc 1918 local addresses from non-local addresses) Core / Networking enhancement 17 years S3 11 19 102 3 213
1364019 need a way to know whether a new tab is just a previously closed tab being restored WebExtensions / General enhancement 6 years S3 0 238 32 1 19
1320585 Allow styling individual tabs WebExtensions / Frontend enhancement 7 years S3 1 144 84 3 73
583890 When the full page title is not shown remove redundant text in tabs Firefox / Tabbed Browser defect 13 years S3 2 36 68 0 221
1283299 Implement titlebar rendering on GTK 3.20+ Core / Widget: Gtk enhancement 7 years S3 8 45 99 0 168
32157 Title tips (tooltips) for cropped text Core / XUL defect 23 years S3 17 49 79 0 154
1407486 no way to configure Firefox to automatically restore sessions WebExtensions / General enhancement 6 years S3 0 219 31 0 19
1399147 getRecentlyClosed() shows tabs that were closed in PREVIOUS browsing sessions WebExtensions / General defect 6 years S3 0 228 20 0 16
36539 Accessibility: Saving focus & selection in session history (back - forward should preserve focused/active link for keyboard navigation) Core / DOM: Navigation defect 23 years S3 37 46 82 1 99
1411603 Impossible for WebExtension to detect when FF has done restoring tabs from previous session (new API request) WebExtensions / General enhancement 6 years S3 0 230 20 1 6
1307759 WindowManager.setState should be asynchronous, window.restore() is not immediate WebExtensions / General defect 7 years S3 0 230 14 1 5
719114 Crash in [@ js::GCMarker::processMarkStackTop ] from heap corruption Core / JavaScript: GC defect 12 years S2 15 13 76 3 185
111373 Don't allow animated favicons Firefox / Tabbed Browser enhancement 22 years S3 12 83 83 3 99
1436738 Extend the browserSettings.newRelatedTabPosition API to support reverse order of related tabs WebExtensions / General enhancement 6 years S3 0 222 16 0 5
530594 Session restore can result in excessive session cookie lifespan Firefox / Session Restore defect 14 years S3 29 38 83 4 104
61363 Make sure that chardetng-triggered encoding reload is read from the cache Core / DOM: HTML Parser enhancement 23 years S4 22 30 106 1 121
57882 List markers (bullets) render inside adjacent float edge (implement float-displace property) Core / Layout: Floats defect 23 years S3 41 40 71 0 90
429827 Download manager does not warn when its download location does not exist or is write protected Toolkit / Downloads API defect 15 years S3 29 15 63 0 155
80713 Need a way to specify an auto-height (size) for an IFRAME such that the frame is given the full height of the contained content (moz-seamless, part of seamless iframes) Core / Layout: Images, Video, and HTML Frames defect 22 years S3 0 52 94 1 154
1539075 Implement support for JPEG XL (image/jxl) Core / Graphics: ImageLib enhancement 4 years S3 0 67 149 16 62
2212 character alignment not implemented (align=char, charoff=, text-align:<string>) Core / Layout: Tables defect 25 years S3 10 105 77 0 75
1225916 Allow reading and writing bookmark tags WebExtensions / General enhancement 8 years N/A 4 62 82 2 132
390936 Implement Internet Explorer zoom property for css Core / CSS Parsing and Computation enhancement 16 years S3 6 30 85 31 108
1332714 IDN Phishing using whole-script confusables on Windows and Linux Firefox / Address Bar defect 7 years S3 23 20 88 7 121
1638709 Artifacts with webrender compositor enabled on Nvidia GPUs and multiple displays with mixed refresh rate Core / Graphics: WebRender defect 3 years S3 3 3 50 18 196
942756 Unify the different ways we start the debugger server DevTools / General defect 10 years S3 3 2 30 1 246
428378 Synced tabs, bookmarks, and history entries don't have a favicon until the user re-visits that page again Firefox / Sync enhancement 15 years normal 18 46 98 4 96
1118086 [e10s] There is a delay for about 1 seconds to display <select> drop-down list with 1600+ items Core / Layout: Form Controls defect 9 years S3 22 10 83 5 137
482874 Provide a friendlier/more useful alternative when the user encounters a 404 error page. Core / DOM: Navigation enhancement 14 years S3 6 10 65 1 200
1704347 It's less easy to distinguish the current tab since activation of proton Firefox / Theme defect 2 years S2 21 19 82 4 123
227632 Allow user to select among multiple saved logins in HTTP Basic and Digest Auth dialogs Toolkit / Password Manager defect 20 years S3 18 69 76 1 81
53579 calling this.blur() in onfocus handler or this.focus() in an onblur handler do not work Core / DOM: UI Events & Focus Handling defect 23 years S3 16 48 72 0 117
1443863 Implement support for AV1 Still Image File Format (AVIF) Core / Graphics: ImageLib enhancement 5 years -- 0 48 90 18 103
1438359 Show notification/alert status for hidden tabs WebExtensions / Frontend enhancement 6 years S3 0 202 14 0 4
1325692 [commands] Explicit support for overriding built-in keyboard shortcuts by WebExtensions WebExtensions / General defect 7 years S3 1 80 136 2 58
801176 Support canvas 2D API from workers (with transferables for bg image rendering/processing, etc.) Core / Graphics: Canvas2D task 11 years S3 2 23 99 1 158
1431840 Support "beforeCurrent" as an option to browserSettings.newRelatedTabPosition and newUnrelatedTabPosition WebExtensions / General enhancement 6 years S3 0 199 12 0 6
854848 Support the longdesc attribute Core / Disability Access APIs defect 10 years S3 0 123 45 0 74
162659 Maybe "Save Page As" could save as PDF (using Skia PDF) Core / Graphics enhancement 21 years S3 10 63 98 0 81
48333 Ask for confirmation of window close if form has been edited (prompt users before Quit) Firefox / Session Restore enhancement 23 years -- 15 38 68 4 113
214675 Remove Profile Manager UI Toolkit / Startup and Profile System enhancement 20 years S3 0 31 136 0 115
101611 Web sites can easily spoof the Master Password dialog Core / Security: PSM defect 22 years S3 14 37 83 0 112
697359 Move the Library window (Bookmarks, History, Downloads) to a tab (in-content UI) Firefox / Bookmarks & History defect 12 years S3 17 54 93 4 65
122752 SOCKS: Username/Password Authentication (V5) Core / Networking: Proxy defect 22 years S4 7 45 69 0 123
301888 Bookmarks cut instead of opened in new tab from Bookmarks Toolbar Folder (shortcut key "t" in the right-click context menu is inconsistent with that of links) Firefox / Bookmarks & History defect 18 years S4 36 12 55 0 99
172818 Allow movement of toolbars (using visible grippies) Toolkit / Toolbars and Toolbar Customization enhancement 21 years S3 12 90 74 0 47
50511 scrolling/app switching under mouse should cause mousemove (cursor change) Core / DOM: UI Events & Focus Handling defect 23 years S4 41 14 57 0 80
543435 Make initial about:blank loading into iframe not get overwritten by an async channel load Core / DOM: Navigation defect 14 years S3 5 11 42 3 177
1422891 [Rethink] Support mkv|matroska|video/x-matroska in Firefox Core / Audio/Video: Playback defect 6 years S3 5 41 83 17 73
62395 window.screen properties do not change when screen depth and resolution (size) is changed Core / DOM: Core & HTML defect 23 years S3 43 11 59 1 64
431098 Impossible to clear file upload controls (fields) Core / Layout: Form Controls defect 15 years S3 13 38 68 0 99
1475240 allow setting favicon when creating discarded tabs WebExtensions / Frontend enhancement 5 years S3 0 161 22 0 7
833791 [Session Manager] Session Manager API Firefox / Session Restore defect 11 years S3 0 156 23 2 9
715376 implement per-page event queue, to allow timeout grouping/prioritization/etc Core / DOM: Core & HTML defect 12 years S3 0 31 82 1 122
129986 Cached Gif animations don't reset on reload. Core / Graphics: ImageLib defect 21 years S3 16 31 60 0 101
1603956 Racing for the same prototype document causes others to receive an untranslated prototype and then cache it Core / XUL defect 4 years S3 14 5 45 5 137
1509350 Provide tab groups (panorama) Firefox / Tabbed Browser enhancement 5 years S3 5 64 85 7 53
505521 Set screen coordinates during HTML5 drag event Core / DOM: Copy & Paste and Drag & Drop defect 14 years S3 6 33 79 0 107
79107 Styles assigned to OPTION elements aren't used for pull-down SELECT lists (comboboxes) Core / Layout: Form Controls defect 22 years S4 29 18 50 0 84
1600153 Two tabs are opened when clicking on external link Core / Widget: Cocoa defect 4 years S3 26 9 70 5 76
1422637 Volume does not stay where it is manually set using pulseaudio Core / Audio/Video: cubeb defect 6 years S3 2 23 67 7 118
833792 [Session Manager] Session Backend API Firefox / Session Restore defect 11 years S3 0 152 22 2 5
1336208 Bundle and whitelist fonts when privacy.resistFingerprinting = true Core / Graphics: Text enhancement 7 years S3 1 10 41 2 162
185618 Offer choice to open natively with Content-Disposition: attachment (View/Show in browser) Firefox / File Handling enhancement 21 years S3 19 42 62 0 67
1702595 [QM_TRY] Failures in dom/cache/FileUtils.cpp:RemoveNsIFileRecursively Core / Storage: Quota Manager defect 2 years S3 0 0 3 3 201
419911 Support diagonal dragging through bookmarks menus (was:Bookmarks submenu is closed immediately during dragging) Firefox / Bookmarks & History defect 16 years S3 19 33 52 0 81
64926 Page is not rescrolled after text zoom (font size changed) (page position) (increase text size) Core / Layout defect 23 years S3 20 40 48 0 74
52282 (ftp:// or file://) suffixes like (.gz) are Content-Encoding (not Content-Type) [decode and display .gz file] Core / Networking defect 23 years S3 18 36 56 0 77
45700 scrolling menus aren't ideal for large bookmarks lists Toolkit / UI Widgets enhancement 23 years S3 11 42 43 0 97
1467057 Support multi-row tabs build-in or via API for extensions like Tab Mix Plus Firefox / Tabbed Browser defect 5 years S3 0 127 31 0 22
61883 Smarter default prefs for the 5 basic CSS fonts Core / CSS Parsing and Computation enhancement 23 years -- 2 13 44 0 151
593743 about:startup page showing historical startup timings Firefox / General enhancement 13 years S3 0 21 56 0 134
155730 Mozilla doesn't handle files served as */*+xml as XML files Firefox / File Handling defect 21 years S3 4 48 63 0 85
20573 Firefox ignores standard X command line options, like -geometry Toolkit / Startup and Profile System defect 24 years S4 4 49 36 0 105
14027 Indicate whether a link will open in a new window Core / DOM: Navigation enhancement 24 years S3 23 25 56 0 72
1450384 tabs.onUpdated doesn't always report favIconUrl (when restoring discarded tabs) WebExtensions / Frontend defect 5 years S3 0 141 13 1 13
336193 The application should perform a normal shutdown upon receiving SIGTERM/SIGINT/SIGHUP on all OS Toolkit / Startup and Profile System task 17 years S3 7 35 68 2 84
647010 Only present HTTP authentication dialogs if it is the top-level document initiating the auth Core / Networking: HTTP defect 12 years S3 5 12 71 10 97
417545 Ignore image blocking status for the "Reload Image" menu item Firefox / General defect 16 years S3 5 13 31 1 143
1386177 Very high memory usage of GPU Process after watching many HTML5 movies on Firefox, even after closing them all Core / Graphics defect 6 years S4 5 17 65 2 109
1184283 support multiple vsync sources (for different rates and special situations) Core / Graphics task 8 years S3 0 1 23 1 175
378775 implement Opera's behavior for selecting text inside of a link and link drag and drop Core / DOM: Selection enhancement 16 years S3 1 45 79 0 78
302087 Inadequate warning before Profile Manager deletes non-Mozilla files Toolkit / Startup and Profile System defect 18 years S3 16 31 40 0 85
29086 keybinding needed to enter \t (tab) in multiline textfield (textarea) Core / DOM: UI Events & Focus Handling defect 24 years S3 5 27 30 0 126
13474 external processes/filters for textareas Core / Layout: Form Controls enhancement 24 years S3 15 43 57 0 62
1639821 WebRTC sharing indicator displays an XML parsing error Core / XPCOM defect 3 years S3 5 1 61 7 120
1271553 Add ability to implement programmable custom protocol handler WebExtensions / Experiments enhancement 7 years S3 2 26 72 3 94
1039678 Add the equivalent of Google Chrome --disable-web-security to Firefox developer options to globally disable CORS security features. DevTools / General enhancement 9 years S3 1 34 71 1 92
660749 Firefox doesn't (re)validate certificates when loading a HTTPS page from the cache Core / Networking: Cache defect 12 years S3 12 13 79 3 82
1124397 crash in js::jit::AssemblerX86Shared::bind(js::jit::Label*) Core / JavaScript Engine: JIT defect 9 years S3 3 3 31 2 152
628179 Close the find bar when navigating away from the current page Firefox / General defect 13 years S3 5 16 59 1 112
90918 RFE: Add url in "comments" field of the "get info" window when download file. Firefox / File Handling enhancement 22 years S3 6 15 24 0 137
320989 Reuse last tab if blank Firefox / Tabbed Browser defect 18 years S3 10 70 50 1 35
259059 Show when CAPS-LOCK is on and focus is in a password field Core / Layout: Form Controls enhancement 19 years S3 6 46 56 1 72
1702129 Make extension items in native menus optional Core / Widget: Cocoa enhancement 2 years -- 1 25 6 3 142
1466904 Add API to wake up a discarded tab WebExtensions / General enhancement 5 years S3 0 136 14 0 3
1315616 Give extensions access to cached favicon URLs WebExtensions / Compatibility enhancement 7 years S3 9 46 77 2 41
1266960 Extensions can not load file: URLs WebExtensions / General defect 7 years S3 7 46 71 2 50
376027 SVG display:none rules Core / SVG defect 16 years S3 14 11 37 0 105
223636 automatic login for HTTP authentication Toolkit / Password Manager enhancement 20 years S3 7 62 62 0 41
1411641 CSP 'sandbox' directive prevents content scripts from matching, due to unique origin, breaking also browser features [Screenshots] WebExtensions / General defect 6 years S3 9 34 70 4 55
1247628 UDP Socket API for WebExtensions WebExtensions / Experiments enhancement 8 years S3 1 31 89 6 61
706970 Tabs restored at startup (app tabs, session restore) should be refreshed from server, not in a "stale" state from cache Firefox / Session Restore enhancement 12 years S3 6 33 40 0 93
432520 Sometimes a second app icon appears in Dock (restart, profile manager, Quicksilver) Toolkit / Startup and Profile System defect 15 years S3 13 24 52 0 78
253331 Search bar's text should be cleared after a search is performed Firefox / Search defect 19 years S3 15 26 57 0 66
197919 Non Mouse Click & Max Number of Popups Exceptions Core / DOM: Core & HTML enhancement 20 years S3 6 15 46 0 111
25894 Keyboard accesskeys / mnemonics shouldn't be displayed on Windows if "Hide underlined letters" is checked Core / XUL defect 24 years S3 7 24 56 1 88
1455264 Consolidate logic for owner/relatedTab/relatedToCurrent/aOpenerBrowser for tabs Firefox / Tabbed Browser enhancement 5 years S3 0 123 15 5 2
672885 Resizing a fully rendered D3D9/10 accelerated window causes flicker / failure to present back buffer Core / Graphics defect 12 years S3 0 20 45 0 119
125729 When saving page, add source URL address as comment ("saved from ...") [Save As, Save Page As] Firefox / File Handling enhancement 22 years S3 18 33 46 0 56
94270 Implement namespace nodes and namespace axis Core / XSLT enhancement 22 years -- 1 53 41 0 79
1621261 [Wayland] PIP video is not kept on foreground when switching tabs or windows (Workaround:right-click on PiP window and enable always-on-top) Core / Widget: Gtk defect 3 years S2 12 18 65 5 65
500105 Crash @ GraphWalker Core / Cycle Collector defect 14 years S3 4 8 56 1 111
1720080 [QM_TRY] Failures in dom/localstorage/ActorsParent.cpp:PrepareDatastoreOp::DatabaseWork Core / Storage: localStorage & sessionStorage defect 2 years S3 0 0 1 2 167
458524 add mechanism for editing libraries to make changes separately from the undo/redo stack (Automatic syntax highlighting interferes with undo/redo history in rich text editors) Core / DOM: Editor enhancement 15 years S4 0 122 16 0 7
216537 Persist alternate stylesheet selection using content prefs Firefox / General enhancement 20 years S3 7 76 36 1 30
1455296 The “Confirm close” dialog does not inform you about how many hidden tabs you have Firefox / Tabbed Browser defect 5 years S3 0 120 14 0 9
973759 Master password should be protected with stronger cryptography Toolkit / Password Manager defect 10 years S3 3 30 91 2 52
707195 Text inflation inflates comments on news.ycombinator.com to different sizes (because inflation computed separately for different table cells) Core / Layout defect 12 years S3 9 24 56 1 74
455077 Enable full color_management by default (i.e. set gfx.color_management.mode = 1) Core / Graphics: Color Management enhancement 15 years S4 7 14 75 0 80
1283320 Make History aware of userContextId Core / DOM: Security enhancement 7 years S3 1 29 68 1 75
197956 Loading a 698KB XML file is very slow (pretty printed with XSLT) Core / XSLT defect 20 years S3 15 16 48 0 74
88982 Add page load size, speed, and time remaining to status bar Firefox / File Handling enhancement 22 years S3 12 45 43 0 48
1795235 Extensions menu can't be customized WebExtensions / General defect 1 year, 4 months S3 17 20 58 2 51
901614 Adopt Tor as a feature in Firefox Firefox / Security enhancement 10 years S3 2 62 69 0 30
307866 min-width/min-height/max-width/max-height does not work for table elements Core / Layout: Tables defect 18 years S3 6 23 51 7 68
201011 custom key bindings no longer possible Core / DOM: UI Events & Focus Handling defect 20 years S3 1 61 64 0 39
137367 Implement orphans and widows Core / Layout: Block and Inline enhancement 21 years S3 5 60 58 0 34
97278 Retain original source formatting: Composer adds newlines when switching view modes (extra empty space added) Core / DOM: Serializers defect 22 years S3 11 20 43 0 81
1528604 API to manage multiple sessions at the same time WebExtensions / General enhancement 5 years S3 0 100 39 2 5
406157 Cannot search for bookmark folders in Library or bookmarks sidebar (searching for folders in "Organize bookmarks" returns no results, doesn't find folder names) Firefox / Bookmarks & History defect 16 years S3 9 45 49 1 46
385615 {inc} style of :first-letter used to erroneously calculate (intrinsic) width of element Core / Layout defect 16 years S3 25 16 48 1 42
248955 search box should be tab-specific (content should not persist when switching tabs) Firefox / Search enhancement 19 years N/A 9 16 42 1 87
1470692 Enhancement: provide restore session for 2-3 sessions back. Firefox / Session Restore enhancement 5 years S3 0 120 9 0 4
60426 Allow users to choose between generated and source html in view-source Toolkit / View Source enhancement 23 years S3 13 18 56 0 64
654072 form input state (including disabled state and other properties) are cached across reloads and history navigation Core / DOM: Forms defect 12 years S3 8 26 52 1 64
158757 Make type ahead find work with button and image labels Toolkit / Find Toolbar defect 21 years S3 19 31 42 0 40
1360392 crash in EMPTY: no crashing thread identified; ERROR_NO_MINIDUMP_HEADER (Firefox for Desktop only) Toolkit / Crash Reporting defect 6 years S2 12 5 39 5 80
516502 Re-add AppleScript support for getting the current URL Firefox / Shell Integration defect 14 years S3 2 61 43 0 42
493857 Implement Content Security Policy Core / Security task 14 years S3 3 31 72 2 50
306625 "Always use my colors" disables backgrounds Firefox / Settings UI defect 18 years S3 11 8 49 1 79
232919 implement zoom to best size (OS X maximize) Core / Widget: Cocoa enhancement 20 years S3 11 24 49 0 62
102380 "Open in New Window" -> download or helper app leaves extra blank window Firefox / File Handling defect 22 years S4 7 53 38 0 42
72352 Make emacs textfield keybindings a pref [aka, conflicting key bindings on linux/unix] (Ctrl+W doesn't close empty tabs) Core / DOM: UI Events & Focus Handling defect 22 years S3 22 16 36 0 53
1476616 SessionStore.setTabState should serialize principals Firefox / Session Restore enhancement 5 years S3 0 111 13 1 1
1457000 Handle the hidden tabs doorhanger case where tabs are hidden in a different window WebExtensions / Frontend enhancement 5 years S3 0 111 9 0 6
1413263 Implement sessions.onRestore WebExtensions / General enhancement 6 years S3 2 101 15 2 5
935216 Implement Client-Hints HTTP header Core / Networking: HTTP enhancement 10 years S3 2 19 64 2 72
727420 Tab tearing is too sensitive. Tabs frequently moved to new window accidentally. Firefox / Tabbed Browser enhancement 12 years S3 4 14 35 2 95
621429 Proxy configuration : "Use system proxy settings" assumes no proxy if IE is set to auto-detect itself. Core / Networking: Proxy defect 13 years S3 4 14 53 0 86
460969 Copy/paste of images from content area lose transparency information Core / Widget: Win32 defect 15 years S2 8 12 46 1 80
226301 text cursor disappears sporadically with css scale down Core / Web Painting defect 20 years S3 1 19 39 0 98
57420 no support for helper app command line args Firefox / File Handling defect 23 years S3 13 27 47 1 49
1404468 Various websites like GitHub load with flash of unstyled content (FOUC) Core / Layout defect 6 years S3 1 13 46 3 90
515521 All pending cookie popups for a given domain should be handled when one of them is in the cookie confirmation dialog Firefox / General defect 14 years S3 2 32 43 0 72
492557 Create a keyboard shortcut HUD Firefox / Keyboard Navigation enhancement 14 years S3 2 4 51 2 99
356558 Firefox displays cached iFrame instead of the new iFrame SRC that is defined. Core / DOM: Navigation defect 17 years S3 3 42 49 0 52
315278 Update process produces a broken application when disk space is low Toolkit / Application Update defect 18 years S3 17 4 48 4 58
136633 View Source gets wrong source when same URL is open in two windows simultaneously with different content Core / DOM: Navigation defect 21 years S3 4 34 47 0 63
91190 Locale font is used for Unicode, UI font pref is ignored. Core / Internationalization defect 22 years S3 13 19 42 2 59
65770 File Download not recognizing disk full [before downloading, on dismissing file picker] Firefox / File Handling defect 23 years S3 19 16 43 0 50
1709175 Switch from select() to poll for MacOS to reduce CPU usage Core / Networking defect 2 years S3 2 2 31 4 109
1457203 Delay the tab hidden doorhanger until a background window is focused WebExtensions / Frontend enhancement 5 years S3 0 112 8 0 1
1208646 3D CSS demo rendered extremely slowly Core / Graphics: WebRender defect 8 years S3 1 10 39 0 103
578828 Default to not allowing onbeforeunload dialogs Core / DOM: Core & HTML enhancement 13 years S3 1 15 58 1 81
549114 Support column breaks part of CSS Fragmentation Module Level 3 Core / Layout enhancement 14 years S3 1 61 52 1 28
506975 [Session Restore] Write sessionstore.js less often when on battery Firefox / Session Restore enhancement 14 years S3 0 16 22 0 110
228673 boxObject.height is not being calculated correctly for xul:label with certain styles Core / XUL defect 20 years S3 0 44 45 0 58
1328776 Provide ability to show multiple sidebar contents parallelly Firefox / General defect 7 years S3 2 39 58 0 47
646552 mailto: links ignore target="_blank" when set to a web protocol handler Core / DOM: Navigation defect 12 years S3 1 37 47 2 56
236107 wrong background for groupbox caption when used in tab panels Toolkit / UI Widgets defect 20 years S4 11 15 33 0 74
1005844 jemalloc can miss usable regions in low-memory conditions Core / Memory Allocator defect 9 years S3 0 8 32 0 109
865789 Implement W3C Web Crypto API Core / DOM: Web Crypto enhancement 10 years S3 0 26 92 0 40
308338 Support the 'baseline-shift' property in SVG Core / SVG enhancement 18 years S3 6 25 38 0 67
1749345 White screen for up to 30 sec after updating Firefox using the full installer, due to FirstStartup component Toolkit / General defect 2 years S2 1 0 29 6 105
1370630 preventDefault() on form.dispatchEvent(new Event('submit'))? Core / DOM: Forms defect 6 years S3 4 1 32 5 94
1330882 When privacy.resistFingerprinting = true, set new windows to rounded dimensions [tor 19459] Core / XUL defect 7 years S3 1 4 22 1 113
1292273 Crash in nvwgf2um.dll | BaseThreadInitThunk Core / Graphics defect 7 years S3 0 1 21 6 111
1246615 Make Firefox explicitly aware when running a profile from future. Toolkit / Startup and Profile System enhancement 8 years S3 5 8 51 8 62
961325 SpiderMonkey should let Firefox tell it why it called JavaScript code Core / JavaScript Engine enhancement 10 years N/A 1 1 27 0 117
571344 Support transitions to and from 'auto' values of left, top, width, height, etc. Core / CSS Parsing and Computation defect 13 years S3 3 43 53 3 32
460050 go game benchmark is ~1.5x as slow as v8 Core / JavaScript Engine: JIT defect 15 years S3 0 11 33 0 102
1420777 Http/2 connection reuse to non-origin server for new hostname on DNS overlap Core / Networking: HTTP task 6 years N/A 17 4 44 3 51
1406996 stylo: Investigate crash reports around Rust HashMaps Core / CSS Parsing and Computation defect 6 years S3 10 0 43 0 81
1398528 HTML <input type=number> should not allow users to type in characters that are not part of a number Core / DOM: Core & HTML defect 6 years S3 16 10 50 2 43
1371786 Allow content scripts on reader mode pages WebExtensions / General enhancement 6 years S3 4 25 35 1 67
1320332 Support overriding existing keybinding through WebExtensions WebExtensions / Frontend defect 7 years S3 1 45 74 1 21
1246693 Provide WebExtension Thumbnail API WebExtensions / Frontend enhancement 8 years S3 1 80 28 0 13
1208775 this !== window within content_scripts WebExtensions / General defect 8 years S3 11 7 36 5 65
338291 Words added to the personal dictionary are not suggested for misspelled words Core / Spelling checker defect 17 years S4 8 21 50 1 52
286933 Key events in the autocomplete popup should be hidden from page scripts Toolkit / Autocomplete defect 18 years S3 7 15 51 0 64
66183 Domain guessing results in incorrect "host not found" errors ("www." and ".com" incorrectly added) Core / DOM: Navigation defect 23 years S4 15 15 44 0 48
1563825 Crash in [@ mozilla::dom::JSWindowActor::ReceiveRawMessage] Core / DOM: Navigation defect 4 years S3 2 0 31 5 98
1451762 Inappropriate message "You must enable DRM to play some audio or video on this page" Firefox / Messaging System defect 5 years S3 1 17 59 0 67
1405971 Webextension UUID leak via Fetch requests WebExtensions / General defect 6 years S3 1 10 52 6 70
1292701 Autoclose popups shouldn't close when they open a modal dialog (e.g., file picker) Core / XUL defect 7 years S3 5 18 40 2 67
969395 [WebRTC] Support hardware accelerated vp8 encoding & decoding for WebRTC Core / WebRTC: Audio/Video defect 10 years S3 0 3 29 0 109
861090 User should be able to opt to download instead of play MP3/MP4/M4A files in "Settings > Applications" Firefox / General defect 10 years S3 3 25 37 0 68
810932 Investigate how to redesign sessionstore.js for improved performance Firefox / Session Restore task 11 years -- 1 40 43 0 51
332740 [BC] rowspan and border-collapse: collapse breaks border rendering Core / Layout: Tables defect 17 years S3 14 18 42 0 47
228205 Redesign nsIConsoleService and related APIs DevTools / Console defect 20 years S3 1 40 65 0 35
50673 Can't start/end a selection inside a link or <button> Core / DOM: Selection defect 23 years S4 9 21 32 0 63
1814586 System freezes on Debian Bullseye and Bookworm Core / Graphics: WebRender defect 1 year, 27 days S3 0 2 9 4 114
1741149 updateBrowserRemoteness throws intermittently Firefox / Tabbed Browser defect 2 years N/A 14 0 4 35 25
1512802 Consider allowing individual session management of containers Firefox / Session Restore enhancement 5 years S3 0 69 36 4 12
1409262 Updated openerTabId is not notified via tabs.onUpdated if it is changed by tabs.update() WebExtensions / General defect 6 years S3 0 80 19 0 18
1407972 [ux] Improve customization experience by allowing URL bar items (page actions and others) to be managed from within customize mode Firefox / Toolbars and Customization defect 6 years S3 8 60 16 0 26
1333781 Allow existing (built-in) menu shortcuts to be reassigned as custom shortcuts via System Preferences Core / Widget: Cocoa defect 7 years S3 13 11 40 6 44
1141021 New API for low level filesystem access Core / DOM: Core & HTML defect 8 years S3 0 3 33 0 104
869543 Move findbar to the top Toolkit / Find Toolbar enhancement 10 years S3 5 16 55 1 56
688556 Background of cell paints over border when borders are collapsed and tbody, row, or cell is relatively positioned Core / Layout: Tables defect 12 years S3 3 24 48 5 50
455164 CSS transforms (that are more than just translations) do not apply to the options of a selectbox Core / Layout: Form Controls defect 15 years S3 11 21 45 1 43
266600 Open containing folder function does nothing (KDE) Toolkit / Downloads API defect 19 years S3 4 30 33 1 58
242237 ability to freeze (and thaw) all page animation: GIFs, Flash, DHTML (e.g. to prevent "DHTML popup ads") Core / General enhancement 19 years S3 15 22 32 0 43
58554 Support using external programs to show non-inlined images and other content Firefox / File Handling enhancement 23 years S3 15 18 29 0 50
1324919 Land logins API WebExtensions / Experiments defect 7 years S3 4 26 64 2 36
920031 Find text is not remembered between tabs (e.g. when Find Again) Firefox / Tabbed Browser defect 10 years S3 5 33 31 0 52
571918 title of an opened tab keeps showing "Loading" when using a Persona Firefox / Theme defect 13 years S3 17 4 34 0 57
220701 "collapsed" is not persisted the same way that "currentset" is for custom toolbars Toolkit / Toolbars and Toolbar Customization defect 20 years S3 12 20 35 0 50
86886 Interface with Apple's spell checker arch on Mac OS X Core / Spelling checker enhancement 22 years S3 2 47 37 3 32
1507582 IDN spoofing: should use unicode confusables list to check any IDN domain against alexa top 10000 like chromium Firefox / Address Bar defect 5 years S3 15 2 32 12 39
1263794 ... Core / JavaScript Engine defect 7 years S2 20 0 25 1 57
967709 V8 is 2.8x faster at sin/cos Core / JavaScript Engine: JIT defect 10 years S3 0 5 26 0 101
401380 Images dragged to desktop don't land where you drop them, move folders Core / Widget: Cocoa defect 16 years S3 15 20 30 0 43
265084 Need to deal with integer overflows in reflow (consider making nscoords be floats) Core / Layout defect 19 years S3 5 6 43 4 67
190515 window.close() for non-script-owned windows is ignored (should create a dialog or "please close me" page) Core / DOM: Core & HTML defect 21 years S3 2 16 33 0 77
96057 Paragraph directionality control UI in Editor Core / DOM: Editor enhancement 22 years S3 4 34 28 0 54
1556212 Per-Domain Cookie Permissions are broken with FPI enabled Core / Permission Manager defect 4 years S3 9 5 39 5 56
1542189 [wfh] Add profile switching to Firefox Account button Firefox / Firefox Accounts enhancement 4 years S3 8 18 49 4 37
1485683 browser.tab.insertaftercurrent order Firefox / Tabbed Browser defect 5 years S3 0 73 16 0 23
943182 Consider syncing CustomizableUI state (toolbar customization) between devices Firefox / Toolbars and Customization enhancement 10 years S3 14 23 39 0 33
909094 ... Core / JavaScript Engine: JIT defect 10 years S2 10 0 39 1 70
530074 Crash [@ StrChrIA ] from winsock and shlwapi.dll (LSP, evil *x86.dll module) Core / Networking: HTTP defect 14 years S4 0 3 36 2 91
260839 Ability to log out of HTTP Auth for individual site Core / Networking: HTTP enhancement 19 years S3 1 42 42 0 38
196843 Fastload CSS style sheets Core / CSS Parsing and Computation defect 20 years S3 1 20 58 1 51
27771 page up/down when focus is in text field should scroll containing page Core / DOM: UI Events & Focus Handling defect 24 years S3 9 12 22 0 72
1470829 Scroll bar from the “Hidden Tabs” and "All Tabs" menu is not fully displayed in maximized windows Firefox / Tabbed Browser defect 5 years S3 3 79 7 0 12
1340930 Add secure overlay API WebExtensions / General enhancement 7 years S3 3 15 47 4 53
670531 Copying the URL bar content to the clipboard after modifying it results in missing http:// in the clipboard Firefox / Address Bar defect 12 years S3 9 16 37 2 48
668577 registerProtocolHandler notification should provide a "don't ask me again" button Firefox / General defect 12 years S3 5 12 45 2 58
130327 Passwords in urls are saved in history Toolkit / Places defect 21 years -- 8 2 40 1 69
113536 tooltips don't handle mousedown event Core / XUL defect 22 years S3 11 10 41 0 52
100571 Provide command-line functionality to convert a file/URL directly to PDF/PS/other printer output (html2printer) Core / Printing: Output enhancement 22 years S3 6 32 40 0 38
1704274 Proton Icons appear blurry Firefox / Toolbars and Customization defect 2 years S4 4 5 33 2 76
1704131 Hard to differentiate between active (foreground) and inactive (background) windows Firefox / Theme defect 2 years S3 8 11 47 4 43
1701123 Port Firefox to GTK4 Core / Widget: Gtk enhancement 2 years -- 0 13 66 4 47
1464938 Crash in AsyncShutdownTimeout | profile-change-teardown | Extension shutdown: * Toolkit / Add-ons Manager defect 5 years S2 8 2 30 5 64
1301878 Implement support for Zstandard (zstd) Core / General enhancement 7 years -- 0 11 54 1 65
1245262 keyboard shortcuts for opening new container tabs Firefox / Tabbed Browser defect 8 years S3 0 3 35 1 88
704094 Add a DOM View to the inspector DevTools / Inspector enhancement 12 years S3 8 15 34 2 52
638598 Iframe parent window page does not scroll to # anchor by user interaction(click ,enter) Core / DOM: Core & HTML defect 13 years S3 6 17 36 0 56
588710 Implement "about:shortcuts" showing all shortcuts and allowing the editing of shortcuts Firefox / General enhancement 13 years N/A 0 30 67 0 31
582005 Session Restore negatively impacts startup time based on the number of tabs loaded Firefox / Session Restore defect 13 years S3 1 39 56 0 28
470699 Sync site permissions (nsIPermissionManager) Firefox / Sync enhancement 15 years S3 5 43 46 3 14
331979 Support metalink file download format Toolkit / Downloads API enhancement 17 years S3 0 37 41 0 42
194937 Turn off caret browsing when Firefox relaunched Firefox / Disability Access defect 21 years S3 11 4 33 1 61
64232 Separate pref for chrome tooltips Core / XUL defect 23 years S3 16 7 31 0 49
54479 execCommand("indent") unexpectedly directly nests list elements Core / DOM: Editor defect 23 years S3 11 8 34 3 52
40106 Accelerated Download for files with mirrors (swarming) Firefox / File Handling enhancement 23 years S3 9 22 34 0 45
1705217 When Firefox is updated by a package manager while it is running, new processes cannot be started Toolkit / Application Update defect 2 years S2 15 4 39 7 31
1399501 Don't allow glsl[130,400) unless we have gpu_shader5 (was: Jenga WebGL game is not loading in the webpage) Core / Graphics: CanvasWebGL defect 6 years S3 7 1 15 0 87
1319168 Implement externally_connectable from a website WebExtensions / Compatibility enhancement 7 years S4 1 12 60 2 52
1295122 Sync fails with "Services.logins is undefined" Firefox / Sync defect 7 years S3 13 0 24 5 57
1149826 Mac "text replacement" feature does not work in forms Core / DOM: Editor enhancement 8 years S3 4 15 63 2 37
771339 Live function editing DevTools / Debugger enhancement 11 years S3 6 20 48 2 38
455986 SVG filters feImage with xlink:href doesn't work with fragments Core / SVG defect 15 years S3 6 25 43 0 39
318514 firefox loses track of its window width Firefox / General defect 18 years S3 10 11 21 0 64
115328 Save As Web Page Complete saves both scripts and output from scripts, resulting in duplicated content Core / DOM: Navigation defect 22 years S4 15 8 33 0 45
85686 window.getSelection() fails when text selected in a form field Core / DOM: Selection defect 22 years S3 2 31 37 1 43
76854 Mozilla ignores keyboard input if a window manager is not used Core / DOM: UI Events & Focus Handling defect 22 years S3 10 9 24 0 64
74803 Should make global data const where possible Core / General defect 22 years S4 0 3 22 0 96
46135 input helper applications for file upload form submission Core / DOM: Core & HTML enhancement 23 years S3 0 39 32 0 44
43114 Need better approach to store scroll position in session history Core / Layout defect 23 years S3 0 31 52 0 39
1863246 Copy and Paste context menu entries are sometimes disabled when they should not be Core / DOM: Navigation defect 3 months S2 7 2 41 1 63
1749962 Losing Treeherder authentication every few hours Core / Networking: Cookies defect 2 years S3 1 0 14 2 97
1378096 Push API in Extensions WebExtensions / General enhancement 6 years S3 0 48 53 1 12
1321428 Land the ScrollTimeline API behind a pref Core / DOM: Animation defect 7 years S3 2 0 14 2 95
1247189 Null deref in TrackBuffersManager Core / Audio/Video: Playback defect 8 years S3 0 2 9 4 97
1195242 The whole page should be replaced by a Safe Browsing warning when a frame or sub-resource is blocked Toolkit / Safe Browsing defect 8 years S3 9 1 32 1 65
670928 HTML5 element and WAI-ARIA landmark roles easily navigable in Firefox Firefox / Disability Access enhancement 12 years S3 3 10 31 0 71
597564 Default minimum tab width should be smaller (to prevent tabscroll) Firefox / Tabbed Browser defect 13 years S3 1 31 34 0 48
342675 Spell checker still shows suggestions in context menu, after deselected the word, closed the tab.. etc. Firefox / General defect 17 years S3 13 6 35 0 48
292481 Support link fingerprints for downloads (file checksum/hash in href attribute) Toolkit / Downloads API enhancement 18 years S3 2 27 34 1 48
258012 Add UI for "View as Text/HTML/..." option for unknown mime content-type Firefox / File Handling enhancement 19 years S3 5 48 32 0 19
210657 percentage height div (overflow:auto/scroll) in table should be scrollable but isn't Core / Layout defect 20 years S3 11 9 30 0 55
166786 Can't save / view source POST query (e.g. ebay auction) Toolkit / View Source defect 21 years S3 4 23 23 0 60
142102 Mozilla adds extension to filename in Save As dialog even when selecting Firefox / File Handling defect 21 years S3 6 19 29 0 54
88036 Make AllTags mode in Composer use generated content instead of background icons Core / DOM: Editor enhancement 22 years N/A 8 4 20 0 75
79074 [Pref Stylesheet]Generic font family settings ignored when `Allow documents to use other fonts' is off Core / CSS Parsing and Computation enhancement 22 years S3 10 18 29 0 45
48926 Allow horizontally adjacent toolbars (with splitters) Core / XUL enhancement 23 years S3 3 31 46 0 33
41250 automatically download appropriate fonts when a page contains characters that cannot be displayed Core / Layout: Text and Fonts defect 23 years S3 3 43 37 0 26
1698376 Add vertical tabs mode Firefox / Tabbed Browser enhancement 2 years -- 1 41 34 1 31
1470690 All Tabs list flickers before showing the set of tabs that are shown on the tab strip Firefox / Tabbed Browser defect 5 years S3 0 77 9 0 9
1419459 Add CORS information to webRequest details objects WebExtensions / Request Handling enhancement 6 years S3 0 51 41 2 15
1182700 Wheel scrolling periodically stops working with XInput2 Core / Widget: Gtk defect 8 years S3 4 2 41 3 64
341046 Incremental layout should not happen in background tabs Core / Layout enhancement 17 years S3 0 45 53 0 17
141983 Space added to indented line when sending message Core / DOM: Serializers defect 21 years S4 4 8 25 0 74
121793 RFE: Save complete webpage in one file using data: protocol (RFC 2397) Firefox / File Handling enhancement 22 years S3 1 26 50 0 41
114376 Open StarOffice/OpenOffice.org/Oasis Open Document/ODF files in Mozilla Core / Layout enhancement 22 years S3 4 41 28 1 29
1790641 Downloaded files that are automatically opened are deleted on exit of private window Firefox / Downloads Panel defect 1 year, 5 months S3 5 4 37 3 59
1704433 [QM_TRY] Failures in dom/quota/ActorsParent.cpp:QuotaManager::EnsureStorageIsInitializedInternal Core / Storage: Quota Manager enhancement 2 years S3 1 0 4 3 99
1573840 Staged Rollout of DoH to US Users Firefox / System Add-ons: Off-train Deployment task 4 years S3 0 0 19 5 85
1551723 Ability to ask for a different generated password from autocomplete Toolkit / Password Manager enhancement 4 years S3 22 1 29 2 28
1505660 Crash in shutdownhang | nsThread::Shutdown | nsThreadManager::ShutdownNonMainThreads Core / XPCOM defect 5 years S3 1 2 23 14 59
1445211 Download (save page as...) with some ad-blocker fails (because some subresources are blocked) and succeeds when retried Core / DOM: Serializers defect 5 years S3 7 5 28 6 54
1318532 Support browser elements in WebExtensions WebExtensions / General enhancement 7 years S3 3 12 33 4 55
1315306 Crash in AsyncShutdownTimeout | profile-before-change-telemetry | TelemetryController: shutting down Toolkit / Telemetry defect 7 years S4 2 3 27 4 74
1286945 Offer downscaled resolutions and decimated framerates in getUserMedia. Core / WebRTC: Audio/Video defect 7 years S3 11 8 36 5 36
1022241 search box dropdown can show up in the middle of nowhere Core / Widget: Gtk defect 9 years S3 6 10 34 3 52
892485 History sidebar/Library scrolls to top when selected history entry is revisited Toolkit / Places defect 10 years S3 11 9 37 0 43
754861 console.log doesn't show objects at the time of logging if console is closed DevTools / Console defect 11 years S3 10 3 39 1 50
751712 Add support for HTML5 sizes attribute in <link rel=icon> Firefox / General enhancement 11 years -- 1 43 46 1 17
730101 Implement prerendering in Firefox Core / DOM: Navigation enhancement 12 years S3 3 33 56 0 20
648398 Visually unify search and bookmark keywords Firefox / Bookmarks & History defect 12 years S3 6 7 43 1 51
641341 CalculateHypotheticalBox can be slow when lines have lots of placeholders (only placeholders?) on them Core / Layout: Block and Inline defect 12 years S3 0 16 35 2 61
559729 Meta-bug: improve HTTP cache Core / Networking: Cache defect 13 years S3 0 37 57 0 22
429021 identity panel and page info use conflicting terms to indicate lack of verified owner information Firefox / General defect 15 years S3 9 7 43 0 46
367993 Make Firefox have the Translucent theme like IE7 Core / Web Painting enhancement 17 years S3 0 25 40 0 50
355555 Provide visual feedback and override support for content blocked by parental controls Firefox / General defect 17 years S3 0 6 27 0 81
342101 Find bar: Auto-highlight all matches in page Toolkit / Find Toolbar defect 17 years S3 3 34 40 0 31
266554 No referrer sent for meta refresh Core / DOM: Navigation defect 19 years S3 1 7 33 2 69
160200 clipboard.autocopy does not work on Windows Core / DOM: Selection defect 21 years S4 2 24 31 0 53
124536 Eliminate nsCRT::str* to use str* from libC Core / XPCOM defect 22 years S3 2 7 23 0 78
91587 Proxy: "no proxy for" default domain filtering fails w/ non-FQDN (e.g., http://web/) Core / Networking: Proxy defect 22 years S3 5 19 28 0 54
71074 Commands should fire on key down, not keypress (because keypress includes keyrepeat) Core / DOM: UI Events & Focus Handling defect 22 years S3 7 4 24 0 70
64286 web archive save/view support (KDE/Konqueror-like .war, .zip, .tgz, .tar.gz, .tar.bz2, tb2, .tbz2, .jar) Firefox / File Handling enhancement 23 years S3 5 29 37 0 33
31961 feature to zoom so that majority of text on a page is user's default size Core / Layout enhancement 23 years S3 4 8 34 0 64
1788573 Crash in [@ NvGlEglGetFunctions] after suspend&resume if DMABUF and THREADSAFE_GL are enabled. Fixed in Nvidia driver 545 Core / Graphics: WebRender defect 1 year, 5 months S2 4 0 28 5 67
1563801 Netflix crashes Firefox Core / Audio/Video: Playback defect 4 years S3 0 1 26 1 85
1419151 Firefox does not support KDE Plasma 5.9.x+ global menu Core / Widget: Gtk enhancement 6 years S3 1 23 37 1 47
557708 Drag and drop of images from Firefox to Thunderbird as attachment results in BMP conversion, fails when sending Core / Widget: Win32 defect 13 years S3 2 5 26 1 74
549680 Preview from Dreamweaver CS3/CS4 does not work in FF3.6 Toolkit / Startup and Profile System defect 14 years S3 5 5 21 0 72
543200 font fallback should try to use the same font for a complete character cluster or word Core / Layout: Text and Fonts defect 14 years S3 0 3 23 5 77
541844 toolbar items, including bookmarks toolbar and add-on buttons, placed on auto-hide menubar do not work. Firefox / Toolbars and Customization defect 14 years S3 13 13 28 0 37
493503 App icon in macOS Dock is sometimes missing or wrong Firefox / General defect 14 years S3 10 0 28 0 62
479829 A soft or auto hyphen within a possible ligature (eg 'f&shy;f') paints a split ligature glyph Core / Layout: Text and Fonts defect 15 years S4 7 17 37 0 40
341636 Error page for port blocking should include ways to fix Core / DOM: Navigation enhancement 17 years S3 0 14 30 0 67
188567 Double-click to right of text should highlight everything. Core / DOM: Selection enhancement 21 years S4 5 16 24 0 56
186465 DHTML clock animation causing 100% CPU Core / Layout defect 21 years S3 0 7 33 0 73
144000 Caret browsing is not available if there is no selection ranges Core / DOM: UI Events & Focus Handling defect 21 years S3 3 8 30 0 68
120313 save page as text file should give file name .txt extension Core / Widget defect 22 years S3 12 11 26 1 42
75133 Need nsScreenMac::GetGammaValue() implemented Core / XUL defect 22 years S3 5 2 25 0 73
1740499 [fission] Page loads flickers and shows visible redraws (due to too-early paint unsuppression?) Core / Layout defect 2 years S3 4 0 22 4 70
1722368 Bookmarks menus with large numbers of bookmarks may not all fit on screen with Proton Firefox / Bookmarks & History enhancement 2 years N/A 12 2 26 2 50
1713211 "Forget" toolbar icon needs Proton styling (thinner lines) Firefox / Toolbars and Customization defect 2 years S3 0 66 11 1 12
1677963 add regular Linux ARM64 in the CI Release Engineering / General task 3 years S4 1 9 44 6 45
1618094 address bar search term is interpreted as scheme when Firefox runs in an environment where flatpak claims to understand all protocols/schemes Firefox / Shell Integration defect 4 years S3 5 3 26 3 63
1385827 Webextension proposal for ‘printservice’ API WebExtensions / General enhancement 6 years S3 1 43 28 0 29
1269023 poor print quality from pdf on 332-2012.pdf Firefox / PDF Viewer defect 7 years S2 10 6 29 3 45
1209390 Use standard lz4 file format instead of the non-standard jsonlz4/mozlz4 Toolkit / General defect 8 years S3 0 29 59 0 25
1207700 Use XInput 2 device manager on GTK3 Core / Widget: Gtk defect 8 years S3 3 22 49 2 29
968273 Entered URL in firefox, Firefox remember old redirect and i get the wrong page Core / Networking: Cache defect 10 years S3 4 0 29 2 70
904846 Caret positioning is incorrect in an empty contenteditable element with ::before pseudo Core / Layout: Block and Inline defect 10 years S3 1 19 31 2 52
896666 Need to not put WebSocket into loadgroups or something Core / Networking: WebSockets defect 10 years S3 7 11 34 7 35
868370 Provide a way to import user certificates (with their private keys) from PKCS#12/PFX files (Firefox for Android) GeckoView / General defect 10 years S3 1 0 54 3 57
823941 Cannot see cookies stored in private window with using cookie viewer Firefox / Private Browsing defect 11 years S3 8 11 38 0 44
775400 external links sent to firefox cause loss of focus when browser.tabs.loadDivertedInBackground = true Firefox / Shell Integration defect 11 years S3 2 9 22 1 70
764076 intrinsic width of "overflow:auto" element doesn't grow to accomodate its scrollbar Core / Layout: Scrolling and Overflow defect 11 years S3 12 8 30 2 38
692955 camera support for desktop <input accept=image/*> tag. Firefox / General defect 12 years S3 1 17 49 1 42
682838 Unable to open/save from/to GIO remote location Core / Networking: File defect 12 years S3 0 3 27 1 78
567039 support -moz-fit-content, and -moz-available for height/min-height/max-height (block axis) Core / Layout defect 13 years S3 4 20 39 4 34
501421 Implement getIntersectionList(), getEnclosureList() Core / SVG enhancement 14 years -- 2 25 37 0 41
485105 improve tab-to-window experience Firefox / Tabbed Browser enhancement 14 years S3 3 21 50 0 33
463607 Interaction of Clear Recent History dialog and the private browsing mode Firefox / Private Browsing defect 15 years S3 7 4 35 2 52
443386 Sync errors in FIPS mode in NSS (generateRandomKey or keyFromString, NS_ERROR_FAILURE) Firefox / Sync defect 15 years S3 13 6 35 0 38
279022 "Highlight all" cannot be undone after switching tabs Toolkit / Find Toolbar defect 19 years S3 10 6 27 0 52
251198 Bright, clear focus appearance for HTML content on Win/GTK platforms Core / Layout: Form Controls enhancement 19 years S3 2 10 45 0 53
213467 if a bookmark fails to load, try to find a previous redirect target for it in history Firefox / Bookmarks & History enhancement 20 years S3 1 39 24 0 36
193332 about:config doesn't remove deleted prefs with no default Core / Preferences: Backend defect 21 years S4 10 11 32 0 42
188318 typing quickly causes high cpu usage Core / DOM: Editor defect 21 years S3 2 14 36 1 54
89308 Open context menus on mousedown in Windows Core / XUL enhancement 22 years S3 13 15 34 0 29
1673778 Crash in [@ OOM | small] Core / XPCOM defect 3 years S3 23 2 8 4 28
1553260 Automatically unload (discard/hibernate) longly unused tabs to free RAM (when running out of RAM) Firefox / Tabbed Browser enhancement 4 years S3 1 38 31 3 23
1526207 Calling `drawImage()` fails when drawing a video on android Core / Graphics: Canvas2D defect 5 years S3 8 3 32 8 39
1480452 Second instance of Firefox will apply update downloaded by still running first Toolkit / Application Update defect 5 years S3 9 6 37 8 28
1344715 Don't collect sessionstore data during a restore operation Firefox / Session Restore enhancement 6 years S3 0 21 11 0 68
944415 [Australis] add distinct navigation buttons to palette Firefox / Theme defect 10 years S3 6 14 28 0 50
916199 Worker - Support TCPSocket on workers Core / DOM: Core & HTML defect 10 years S3 0 4 26 1 77
709326 After private browsing has closed, sites viewed can still be visible in about:memory Toolkit / about:memory defect 12 years S3 2 3 26 0 75
704128 Maybe implement File API: Directories and System Core / DOM: Core & HTML defect 12 years S3 1 10 46 0 54
700000 Buy Firefox developers some beer. Firefox / General enhancement 12 years S3 0 11 60 3 37
643758 [e10s] HTML5 validation popup doesn't close when the form element scrolls Firefox / Tabbed Browser defect 12 years S3 12 4 31 3 39
437554 Implement BackgroundImage/BackgroundAlpha for filters Core / SVG enhancement 15 years S3 8 22 39 1 23
433422 Self-signed SSL certificates should not be labeled as "invalid" Firefox / Security defect 15 years S3 2 16 23 0 60
336029 "Firefox" is hardcoded in error messages (appstrings.properties) Firefox / General defect 17 years S4 4 2 21 0 75
311756 Some "Warning: Key event not available on ..." Core / DOM: UI Events & Focus Handling defect 18 years S4 6 6 18 0 66
274205 drag and drop does not open window minimized on taskbar Core / Widget: Win32 defect 19 years S4 3 8 31 0 62
267029 Absolutely positioned elements all print on first page, and the ones that don't fit aren't shown Core / Printing: Output defect 19 years S3 10 20 28 1 29
112738 large page with unescaped '<' in email addresses takes 137 seconds to load - locks browser until loaded (nested unclosed tags), plaintext served as HTML Core / Layout defect 22 years S3 4 9 28 0 60
109016 <select multiple size="1"> scroll widget too large (or too small?) Core / Layout: Form Controls defect 22 years S3 11 11 30 0 39
54940 must define list of default MIME type associations for Helper Apps Preferences Firefox / File Handling defect 23 years S3 4 5 30 0 63
1570046 Opening simultaneously more than 3 tabs with video causes massive amount of WMF VPX errors and warnings in about:support/Troubleshooting Information in Graphics section in Failure Log sub-section after landing patch from bug #1521370 Core / Graphics defect 4 years S3 0 7 22 0 75
1439247 "close tab with middle click" feature is disruptive on touchpads where middle click is triggered unintentionally Core / Widget: Gtk defect 6 years S3 0 7 30 1 68
1356532 Try avoiding layout flushes in autocomplete::_handleOverflow Toolkit / Autocomplete enhancement 6 years S3 2 2 15 3 76
1094357 Dark favicons hard to read on Themes with a dark tabstrip background (like the default theme, or dark lightweight themes) Firefox / Theme defect 9 years S3 10 4 32 3 41
985947 [10.9] Popups can shrink when switching to hidpi mode Core / Widget: Cocoa defect 9 years S3 2 7 28 0 64
728046 Create per-tab volume controls in Firefox Firefox / Tabbed Browser enhancement 12 years S3 1 22 48 0 34
627771 Add dithering to gradient color transitions to address banding in 24-bit "truecolor" Core / Graphics enhancement 13 years S3 7 16 40 1 31
610679 Tarball is double gzipped when downloaded with Firefox Firefox / File Handling defect 13 years S3 1 6 18 2 72
314755 sanitization at shutdown sometimes fails (resulting in a confirmation dialog for clearing private data when firefox starts) Firefox / General defect 18 years S3 1 9 29 0 64
276166 Implement "Fit to window width" as in Opera 8.0 (no-horizontal-scrollbar mode) Core / Layout enhancement 19 years S3 3 44 19 0 22
245100 Allow searching/filtering in cookies exceptions dialog Firefox / Settings UI enhancement 19 years S3 9 19 25 0 36
223440 Spell checker checks signature Core / Spelling checker defect 20 years S4 6 17 32 0 41
212831 [DHTML] Speed issue with DHTML based Javascript (animation) Core / Layout defect 20 years S3 0 4 32 0 71
33469 Add a 'blacklist website' feature to Mozilla Core / Graphics: Image Blocking enhancement 23 years S3 6 19 25 0 43
13607 "file:///" shows blank page instead of root (Win) Core / Networking: File defect 24 years S4 5 6 27 0 59
1849393 Firefox regularly hangs for over half a second in SessionWriter.sys.mjs calling IOUtils.writeJSON serializing a massive JS object when saving tab state Firefox / Session Restore defect 6 months S3 5 1 33 4 51
1784093 GPU hangs on ivybridge and sandybridge with backdrop filter blur Core / Graphics defect 1 year, 6 months S2 1 1 16 5 72
1753352 www1.my.commbank.com.au - links fail with Firefox Core / DOM: Content Processes defect 2 years S3 0 0 22 3 74
1601558 Login subdomain suggestions can be overwhelming in some development/company environments Toolkit / Password Manager defect 4 years S3 6 6 34 2 45
1524959 Consider assigning different sessions to separate containers Firefox / Session Restore enhancement 5 years S3 0 53 34 1 3
1520894 Low-latency video playback via MediaSource causes extremely high CPU/GPU usage and poor playback performance. Core / Audio/Video: Playback defect 5 years S3 1 7 36 1 58
1511756 A reload on a discarded tab often causes the tab title to be incorrect. Firefox / Tabbed Browser defect 5 years S3 0 51 10 6 14
1493472 Firefox not remembering window position in windows 10 Core / Widget: Win32 defect 5 years S3 1 11 33 2 53
1457500 Support content handlers in WebExtensions WebExtensions / General enhancement 5 years S3 2 22 49 5 18
1366478 Show thumbnails / previews of bookmarks and allow transformation of sets of bookmarks into tabs Firefox / Bookmarks & History enhancement 6 years S3 0 58 15 1 11
1201160 Service workers violate SOP for "no-cors" CSS Core / DOM: Service Workers defect 8 years S3 0 1 29 1 72
705826 Images are flashing when updates by img.src[]=url in Firefox >= 8.0 Core / Graphics: ImageLib defect 12 years S3 1 18 35 0 46
598587 Prevent pinned tabs from being overwritten by external urls entered from URL bar (but open the URL in new normal tab) Firefox / Tabbed Browser enhancement 13 years S3 6 12 29 0 46
504624 Consider using the Courgette algorithm in product updates Toolkit / Application Update enhancement 14 years S3 2 10 50 1 40
347680 Add Safe Mode option to Session Restore dialogue Firefox / Session Restore enhancement 17 years S3 2 3 23 0 72
266338 Better (more visible) indication of when Find has wrapped or will wrap Toolkit / Find Toolbar defect 19 years S3 8 25 22 0 29
233047 From some download servers, browser uncompresses gzip file, but keeps gz extension. Download manager is confused over file size and time remaining (nsBinaryDetector) Firefox / File Handling defect 20 years S3 6 7 37 1 45
194351 General module to show widespread XML formats: WML, RSS, DocBook, OpenOffice.org etc. Core / XML enhancement 21 years S3 0 37 36 0 25
194319 Bookmark Menu won't scroll with Dragged URL (also Personal Toolbar) Core / XUL defect 21 years S4 3 19 30 0 43
136714 Page-break-after:always doesn't cause page break inside tables Core / Layout: Tables defect 21 years S3 8 17 28 0 35
129480 bookmarks menu automatically scroll up Core / XUL defect 21 years S3 7 15 25 0 42
92921 contenteditable should not replace linebreaks by <br> inside a <pre> Core / DOM: Editor defect 22 years S3 1 12 34 0 54
48332 Can't completely hide toolbars after collapse (via grippy) Core / XUL defect 23 years S3 19 2 23 0 31
19261 When resizing the window, need to keep place in content Core / Layout defect 24 years S3 7 17 29 0 38
8131 Behaviour of image maps with broken images (i.e. AREA and alt text) Core / Layout: Images, Video, and HTML Frames enhancement 25 years S3 4 14 25 0 51
1855346 Emoji Picker immediately closes in MacOS Sonoma Core / Widget: Cocoa defect 5 months S3 6 5 38 0 45
1807364 When switching tabs, newly active tabs always reload Fenix / Tabs defect 1 year, 2 months S2 2 0 51 0 53
1714410 Leaks in webrtc mochitests involving webrtcIndicator.xhtml and PreloadService Core / DOM: Core & HTML defect 2 years S2 0 0 11 4 79
1698171 Run an experiment to determine user preference for Normal vs Compact UI density in Proton Firefox / Toolbars and Customization task 2 years N/A 0 39 42 3 10
1557853 Still sometimes moved and newly added bookmarks are placed in incorrect and wrong order in folder in Library Firefox / Bookmarks & History defect 4 years S3 5 4 13 1 66
1245652 Implement chrome.downloads.onDeterminingFilename WebExtensions / Request Handling enhancement 8 years S3 3 14 35 3 39
1134329 Force updating a service worker from devtools Core / DOM: Service Workers defect 9 years S3 0 2 23 2 70
1054947 "It looks like you haven't started Firefox in a while" message despite running Firefox daily Toolkit / Startup and Profile System defect 9 years S4 4 4 25 3 54
967096 Various popup UI elements (tooltips, panels) appear in the wrong (primary?) monitor Core / Widget: Win32 defect 10 years S3 4 2 22 2 62
838681 Figure out use-cases of the retention preference, and support them in the new downloads experience Firefox / Downloads Panel defect 11 years S3 3 15 27 0 48
715919 Decoding jpegs is ~2x slower in Firefox than with standalone djpeg/tjbench Core / Graphics: ImageLib defect 12 years S3 0 29 42 0 27
641340 IE Maze Solver testcase hits hotspot in nsFloatManager::GetFlowArea Core / Layout: Block and Inline defect 12 years S3 0 21 39 3 33
521264 don't use file.exists() when not necessary Firefox / General defect 14 years S3 0 11 18 2 64
513149 Speed up css parsing(Add telemetry probes to measure extent of problem) Core / CSS Parsing and Computation enhancement 14 years -- 0 17 50 0 36
489100 absolutely positioned child of relative inline containing block is positioned relative to only first line of inline Core / Layout: Positioned defect 14 years S3 10 5 27 5 34
434301 'outline' (focus outline) on inline containing only block causes visual artifact (extra dots) {ib} Core / Layout: Block and Inline defect 15 years S3 10 4 24 1 46
407817 Fast find (find bar) finds text hidden in the overflow of "overflow:hidden" elements but does not show it (scroll to it) Toolkit / Find Toolbar defect 16 years S3 6 6 31 6 36
255225 [Windows] reset IE to default browser upon uninstall of Firefox Firefox / Installer enhancement 19 years S3 10 2 25 0 49
234102 ::-moz-selection deletes default css values for color and background-color Core / CSS Parsing and Computation defect 20 years S3 2 8 20 0 66
1647533 mozregression-gui.exe detected as Trojan:Win32/Zpevdo.B Testing / mozregression defect 3 years S2 1 3 32 1 61
1411795 Add global keyboard shortcut support to commands API WebExtensions / General defect 6 years S3 0 25 55 1 18
1034964 Use ICE regular nomination when peer is ICE-Lite Core / WebRTC: Networking defect 9 years S3 0 31 29 3 27
428602 Cannot modify properties of a Wrapped Native (NS_ERROR_XPC_CANT_MODIFY_PROP_ON_WN) Toolkit / UI Widgets defect 15 years S3 10 3 29 2 37
409969 Sync custom dictionaries Firefox / Sync enhancement 16 years S3 4 19 42 1 26
396441 Improve SSL client-authentication UI Core / Security: PSM enhancement 16 years -- 3 23 32 0 33
291643 high cpu and 100-1 ratio memory opening large xml file Core / XML defect 18 years S3 5 10 27 1 45
201056 default select option changes on reload (if multiple options have same value) Core / DOM: Forms defect 20 years S3 11 9 29 0 32
77976 [Linux/UNIX] Ctrl-H and Ctrl-K not doing what they're supposed to do Core / DOM: UI Events & Focus Handling defect 22 years S3 5 8 23 0 53
10212 Height: 100% does not work when nesting tables Core / Layout: Tables defect 24 years S3 2 15 21 0 53
5704 [AppleEvents] support the DoJavascript() appleevent Core / XUL task 24 years S3 5 7 24 0 54
1524955 Mark different sessions (in session group) by distinct color Firefox / Session Restore enhancement 5 years S3 0 52 33 0 1
1510450 Show form validation errors GeckoView / General defect 5 years S3 11 0 27 5 33
1498093 Not reusing blank tab when opening a few bookmarks at once Firefox / Bookmarks & History defect 5 years S3 0 56 9 2 8
1364404 Create a Floating Panel API WebExtensions / General defect 6 years S3 1 18 32 2 37
1344788 Implement login storage API WebExtensions / General enhancement 6 years S3 1 18 39 1 33
1324394 Allow origins to be edited in the Password Manager Firefox / about:logins enhancement 7 years S3 2 3 39 1 49
1285711 Firefox does not use default file manager Core / Widget: Gtk defect 7 years S3 2 6 36 1 49
1251795 Add global media support for web extension WebExtensions / General enhancement 8 years S3 2 18 50 0 24
1249971 Use AppImage to distribute Firefox binaries for linux Release Engineering / General enhancement 8 years N/A 0 18 37 2 36
1210175 simulcast support for H264 Core / WebRTC: Audio/Video enhancement 8 years S3 1 20 62 2 13
1184059 compatibility issues with domain labels beginning or ending with hyphens Core / Security: PSM defect 8 years S3 9 3 24 3 39
1169485 Extend new MP3 demuxing code to support MSE Core / Audio/Video: Playback enhancement 8 years -- 2 21 28 3 33
1076583 Update <img> load model (non-responsive case) to match new spec Core / DOM: Core & HTML defect 9 years S3 1 3 18 6 59
1041818 take steps to mitigate canvas fingerprinting Core / Graphics task 9 years -- 0 19 46 5 21
1033580 openvpn support Core / Networking enhancement 9 years -- 0 14 46 0 38
978010 Sync not syncing "Cookies and Site Data" exceptions Firefox / Sync enhancement 10 years S3 11 9 37 1 22
801072 Add a visible preference to disable "Close other tabs" prompt Firefox / Settings UI defect 11 years S3 2 26 32 0 28
735914 Restore the session by default Firefox / Session Restore enhancement 11 years N/A 0 34 36 1 19
677919 Inconsistent rendering of Chinese characters Core / Layout: Text and Fonts defect 12 years S3 0 9 21 2 59
672395 Let's kill window.find() Core / DOM: Core & HTML task 12 years S3 1 5 46 1 45
667340 The behavior for loading URLs from the clipboard with middle click is inconsistent Firefox / General defect 12 years S3 5 14 30 1 35
296443 Mozilla should follow shared mime freedesktop specs (determining MIME type of a file and the default app for it) Firefox / File Handling enhancement 18 years S3 2 19 44 0 29
292284 Scrollbar disappears with very small window/div with overflow:scroll Core / Layout defect 18 years S3 6 12 21 0 43
275114 no support for fingerprint reader functions Core / General enhancement 19 years S3 11 13 28 0 25
266122 Outline applied on a multi-line element should encompass all the line boxes and stay connected (join outlines together) Core / Layout defect 19 years S3 8 9 30 1 34
259057 Enable multiple extensions/themes selection (for Update checking, disabling or uninstalling) Toolkit / Add-ons Manager enhancement 19 years S3 7 33 22 0 16
238041 nsDOMEvent::AllocateEvent assigns a PR_Now() into a PRUint32 Core / DOM: Events defect 19 years S3 3 16 31 0 40
221981 implement content pseudo-class :contains() Core / CSS Parsing and Computation enhancement 20 years S3 0 22 28 0 42
175946 Show namespace declarations, doctype, xml declaration and CDATA section markers in XML prettyprinting (xmlns nodes missing) Core / XML defect 21 years S3 7 20 33 0 22
112294 calling an alert box from window.onblur triggers the event multiple times Core / DOM: UI Events & Focus Handling defect 22 years S3 0 3 22 0 69
101743 compute md5 sum in "Saving file" progress window [md5sum] Firefox / File Handling enhancement 22 years S3 7 17 26 0 32
1769534 Preserve non-breaking spaces when copying HTML content Core / DOM: Serializers defect 1 year, 9 months S3 0 3 25 0 64
1633648 pinned Slack tabs sometimes don't restore correctly on startup Firefox / Session Restore defect 3 years S3 1 3 19 8 51
1543752 Stop reading user.js from the profile to modify default prefs unless prefs.js opts in to doing so Core / Preferences: Backend defect 4 years S3 0 3 47 0 49
1535985 `<datalist>` HTML element should display autocompletion drop-down UI GeckoView / General defect 4 years S3 4 0 34 6 40
1412263 Provide preference to change/set default folder for saving bookmarks Firefox / Bookmarks & History enhancement 6 years N/A 7 12 36 1 27
1318234 view-source: uses the cached version of a page, not respecting the caching headers from GMail or other sites Core / Networking defect 7 years S3 6 1 24 2 49
1308059 Implement sessions.getDevices WebExtensions API WebExtensions / General enhancement 7 years N/A 1 43 25 0 12
1219917 When opening developer tools in a separate window, provide option to reuse the same developer tools window for all tabs DevTools / General enhancement 8 years S3 2 19 33 1 31
1215415 Allow sync engines to be enabled or disabled per device Firefox / Sync enhancement 8 years S3 12 4 24 4 26
925267 Autocomplete recently typed values in filter input DevTools / Console enhancement 10 years S3 1 0 20 1 67
857888 webappsstore.sqlite is larger than it should be Core / Storage: localStorage & sessionStorage defect 10 years S3 1 9 33 3 44
683146 about:blank tabs not overwritten when opening multiple bookmarks Firefox / Tabbed Browser defect 12 years S3 3 12 25 0 47
546559 In print-preview, all absolutely-positioned content past first page is piled at the top of the second page Core / Print Preview defect 14 years S3 3 15 26 3 36
468779 Consider integrating Chromium's changes to Hunspell Core / Spelling checker enhancement 15 years S3 1 17 36 1 35
433129 nfs hosted profiles/browsers result in broken search and history because NFS does not follow POSIX filesystem semantics and does not correctly implement posix advisory locking. Add storage.nfs_filesystem preference Toolkit / Storage defect 15 years S3 3 2 21 0 61
418144 Favicons are not affected by a hard refresh Toolkit / Places defect 16 years S3 9 13 26 1 28
347261 / FAYT should invoke Find rather than QuickFind Toolkit / Find Toolbar defect 17 years S3 7 17 25 0 30
336719 Pasted or dragged text is not automatically re-spell checked. Also failing after undo. Core / Spelling checker defect 17 years S3 8 6 25 0 41
335963 better link activation API Core / DOM: Navigation defect 17 years S3 1 28 47 0 14
306585 Back and Forward keyboard shortcuts not working with Swedish/Finnish keyboard Core / Widget: Cocoa defect 18 years S3 1 4 21 0 65
240625 Print Selection splits some text lines across two pages Core / Printing: Output defect 19 years S3 10 9 23 1 33
216418 Page with lots of <pre> text (or rather: extremely deeply-nested inline tags, with lots of linebreaks) uses lots of memory in layout arenas and is slow to load Core / Layout defect 20 years S3 1 8 31 0 51
169388 Handling of non ASCII characters in URLs Core / Internationalization defect 21 years S3 9 9 29 0 31
103279 Anchor scrolling happens twice, once during loading and once after page loading finishes [named anchor] Core / DOM: HTML Parser defect 22 years S3 4 14 36 1 31
71464 Using the scrollwheel above the horizontal scrollbar should scroll horizontal, not vertical Core / XUL enhancement 22 years S3 6 18 21 0 35
47159 Support css3-speech (previously Aural Style Sheet) properties in getComputedStyle Core / CSS Parsing and Computation enhancement 23 years -- 1 14 30 0 46
1835691 ... Core / Graphics defect 9 months S3 3 0 24 2 55
1497075 Provide a way for users to control host permissions WebExtensions / General enhancement 5 years S3 6 9 35 3 26
1495295 Nightly's pinned shortcut in the Windows taskbar becomes invalid after every update Firefox / Installer defect 5 years S3 3 0 18 5 54
1431808 long Integers rounding last two digits to '00' in JSON view DevTools / JSON Viewer defect 6 years S3 15 2 23 1 27
1405521 Crash in nsGlobalWindow::ClearDocumentDependentSlots: MOZ_CRASH(Unhandlable OOM while clearing document dependent slots.) Core / DOM: Core & HTML defect 6 years S3 2 0 19 11 43
1402293 Implement support for High Efficiency Image File Format (HEIF) Core / Graphics: ImageLib enhancement 6 years S3 0 18 35 12 12
1400787 Using software video decoders (include VP9) ramps up computer fans on Macbook. Core / Audio/Video: Playback enhancement 6 years S3 2 3 37 6 37
1329333 autocomplete becomes visually detached from field Toolkit / Form Manager defect 7 years S3 13 1 27 2 28
1276366 Remove support for chrome -> chrome window leaks Core / DOM: Core & HTML defect 7 years S3 0 9 21 1 56
1263100 beforeunload handler can still alter window.location from a timeout Core / DOM: Navigation defect 7 years S3 11 4 25 1 33
1246410 Low performance of texImage2D with canvas2d and WebGL Core / Graphics: CanvasWebGL defect 8 years S3 0 6 45 0 43
1111100 Fix typography in headers of nested panels Firefox / Theme defect 9 years S3 0 0 20 0 71
1063329 Add support for build-backend to generated Xcode projects Firefox Build System / General defect 9 years S3 0 1 22 0 66
787943 Using XIM with Firefox will cause firefox menu cannot popup correctly. Core / Widget: Gtk defect 11 years S3 0 6 8 3 65
741050 Downloads initiated by other tabs are misleading Firefox / File Handling defect 11 years S4 8 7 27 1 35
727422 /usr/share/applications/mimeinfo.cache is used for default applications Firefox / File Handling defect 12 years S3 2 13 32 0 41
723959 ES6: Tail-call optimization in IonMonkey Core / JavaScript Engine enhancement 12 years S3 1 29 47 0 10
686747 Firefox doesn't resize in xmonad on launch in a smaller window. Core / Widget: Gtk defect 12 years S3 1 9 34 0 45
613498 Very slow chrome to content DOM access Core / XPConnect defect 13 years S3 2 18 36 0 31
578694 Clearing history should wipe server and remote clients (desktop) Firefox / Sync defect 13 years S3 4 0 21 0 59
565740 Clear the chrome search field input when navigated away from the results page, and make it tab-specific Firefox / General defect 13 years S3 0 27 42 0 21
565104 Stop sites from opening popup or popunder windows, even in response to clicks Firefox / General defect 13 years S3 3 23 43 1 14
539506 [MathML3] Implement clipboard specification Core / DOM: Copy & Paste and Drag & Drop enhancement 14 years S3 0 8 21 0 59
504342 Investigate milw0rm 9158 "unicode stack overflow" Core / Layout: Text and Fonts defect 14 years S3 1 9 32 1 44
349813 Make a way for site (-moz-document) rules to apply on sites *not* matching a URL/prefix/domain Core / CSS Parsing and Computation enhancement 17 years S3 0 27 25 0 32
319819 opening a new tab with gmail loaded causes the browser window to resize (unmaximizes, moves slightly to the right) Firefox / Tabbed Browser defect 18 years S3 7 11 19 0 39
304048 xpconnect getters/setters don't have principals until after they pass or fail their security check Core / Security: CAPS defect 18 years S3 0 1 27 1 62
254592 Find as you type = off pref, should respect typeaheadfind and not allow autostart Toolkit / Find Toolbar defect 19 years S3 6 11 26 1 36
221855 empty list items are rendered incorrectly Core / Layout: Block and Inline defect 20 years S3 12 2 28 0 32
217769 [BC] border collapse borders not correct when empty row groups are involved Core / Layout: Tables defect 20 years S3 10 7 23 0 34
133371 Domain Guessing: Disable by default Core / DOM: Navigation defect 21 years S3 1 7 26 0 55
64068 Set Image blocking (preferences) doesn't work for local drives! Core / Graphics: Image Blocking defect 23 years S3 8 6 16 0 46
63798 login errors bring up save-as dialog Firefox / File Handling defect 23 years S3 14 1 24 0 31
27493 Default open/save directory isn't smart Firefox / File Handling defect 24 years S3 5 4 24 0 50
1547349 PiP Twitter/Facebook video stops when original video is scrolled out of view Toolkit / Picture-in-Picture defect 4 years S3 6 3 28 2 38
1503259 Animated page load throbber causes a permanent ~9% CPU load for Renderer threads of the main process Core / Graphics: WebRender defect 5 years S3 3 6 26 1 45
1478424 Eagerly load favicons Firefox / Tabbed Browser enhancement 5 years S3 0 56 10 0 5
1444567 speechd/speech-dispatcher affects all system audio (was: Opening Google Translate corrupts audio for all other tabs) Core / Web Speech defect 5 years S3 3 1 15 6 50
1359455 Require passing getter_AddRefs to T**-style outparams Developer Infrastructure / Source Code Analysis enhancement 6 years S3 0 0 29 2 56
1223880 Implement initial-letter (from CSS Inline Layout Module Level 3) Core / Layout: Block and Inline enhancement 8 years S3 0 16 31 1 37
1218070 crash in libsystem_kernel.dylib@0x16286 with mozilla::gl::TexSubImage2DHelper Core / Graphics defect 8 years S3 3 0 24 5 46
951104 Enable <a ping> by default Core / DOM: Navigation enhancement 10 years S3 1 2 36 0 51
793345 Code executed with Debugger.executeInGlobalWithBindings (Scratchpad or Webconsole) runs 10x - 80x slower than the same code in a script tag Core / JavaScript Engine: JIT defect 11 years S3 6 6 33 1 34
656343 After redirect to page requiring HTTP or FTP basic/username/password auth, the redirect destination is not in the address bar Core / Networking: HTTP defect 12 years S3 9 1 28 1 36
634074 Cannot validate valid certificate chain when looping/cross-signed certs are involved NSS / Libraries defect 13 years S4 2 5 26 2 47
605222 add support for .website shortcuts, msapplication meta information in Windows 7 Firefox / General defect 13 years S3 1 26 40 0 18
585352 Certificate Manager misleads users into thinking that they can distrust CAs and/or intermediates Core / Security: PSM defect 13 years S3 4 21 27 1 23
539597 Make SessionStore handle full screen mode Firefox / Session Restore defect 14 years S3 7 26 22 0 17
414961 Restart Firefox button missing from UI Firefox / General defect 16 years S3 3 6 29 0 46
371179 Don't allow bookmarking an evaluated+loaded javascript: URL Firefox / Security defect 17 years S3 1 6 39 0 43
332990 Firefox jumps into the foreground when Quick Find bar disappears Toolkit / Find Toolbar defect 17 years S4 10 6 22 0 33
331257 data: images show up when 'load images' (Tools->Options->content->checkbox) is disabled Core / Graphics: Image Blocking defect 17 years S4 5 12 26 0 36
222274 Up and down arrows displayed in Bookmarks menu even when it is impossible to scroll Toolkit / UI Widgets defect 20 years S4 5 4 25 0 47
176525 Allow auto-linking, automatic detection and linking of URLs during editing Core / DOM: Editor enhancement 21 years S3 11 10 21 0 26
68851 HTML buttons should go :active on keydown (spacebar) Core / Layout: Form Controls defect 23 years S3 7 11 19 3 31
51139 ESC/Stop needs to stop javascript Core / DOM: UI Events & Focus Handling defect 23 years S3 3 13 27 0 39
32265 Jump-scroll should indicate already-seen area Core / XUL enhancement 23 years S3 5 14 22 0 37
1866555 firefox content view flickering on s22 (Europe model/Xclipse GPU) after one ui 6 Upgrade Fenix / General defect 3 months S3 2 0 26 8 39
1770057 ... Core / JavaScript Engine defect 1 year, 9 months S3 0 0 55 2 35
1708141 [QM_TRY] Failures in dom/localstorage/ActorsParent.cpp:CreateStorageConnection Core / Storage: Quota Manager defect 2 years S3 0 0 2 4 70
1674295 high memory usage on Facebook [without ffmpeg installed] Core / JavaScript Engine defect 3 years S4 0 4 18 4 53
1666160 Users enable `privacy.resistFingerprinting` and then are surprised when it causes problems Core / DOM: Security enhancement 3 years S3 9 3 32 3 23
1609129 Line of white pixels on the left, bottom and right of a maximized window on secondary monitor Core / Widget: Win32 defect 4 years S3 1 0 23 5 51
1567639 Intermittent Android WPT reftest failures due to a CSS background image that hadn't (yet?) rendered Testing / web-platform-tests defect 4 years S3 14 0 7 0 41
1554014 TinyMCE versions 3.4.4 and older don't work in Firefox 67 Core / DOM: Core & HTML defect 4 years S3 0 3 24 0 58
1541072 Shaking elements after scrolling on Reddit Core / Graphics: WebRender defect 4 years S3 2 7 25 5 38
1529777 Hard max-run-time invites intermittent failures [DO NOT USE FOR CLASSIFICATION] Firefox Build System / Task Configuration enhancement 5 years S3 2 0 3 5 64
1451307 Tracking Protection fails to report blocked requests made in iframes Firefox / Protections UI defect 5 years S3 1 1 10 3 64
1411693 Google's search box shadow animation flickers/New tab shadows Core / Graphics: WebRender defect 6 years S3 5 3 12 2 50
1394448 Cannot install Addon with privacy.resistFingerprinting==true Core / DOM: Security defect 6 years S3 5 9 29 3 28
1322304 Allow vanity URLs for WebExtension pages WebExtensions / Frontend defect 7 years S3 1 9 27 2 43
1225682 disallow member variables of type nsAuto{C,}String Developer Infrastructure / Source Code Analysis defect 8 years S3 0 0 20 0 64
1219219 Firefox Sync fails behind Proxy-servers/Proxy-authencation Firefox / Sync defect 8 years S3 4 0 17 3 52
1195005 There is no way to add a custom search engine or edit an existing one in about:preferences#search Firefox / Settings UI enhancement 8 years S3 0 23 28 0 29
1150172 Investigate smarter paint suppression Core / Layout defect 8 years S3 0 2 23 0 61
1114683 ... Developer Infrastructure / Source Code Analysis enhancement 9 years S3 1 0 34 1 51
837985 OpenStreetMap's new javascript-based editor iD is sluggish Core / Web Painting defect 11 years S3 1 13 30 0 40
813742 Parallelize the reftest and crashtest suites Testing / Reftest defect 11 years S3 1 0 23 0 61
588402 Bug 130078 breaks smooth scrolling Core / Layout defect 13 years S3 0 5 21 0 57
583351 Firefox sends GET request twice to server for a dynamically-generated small PNG image Core / Graphics: ImageLib defect 13 years S3 2 4 31 0 47
567362 Invisible table elements (visibility:collapse) get copied to the clipboard Core / DOM: Serializers defect 13 years S3 0 3 84 1 11
456957 nsIContentPolicy cannot examine redirected urls Core / Networking defect 15 years S3 0 14 23 0 45
421128 Independent windows/tabs should not starve each other for network connections Core / Networking defect 15 years S3 1 17 33 0 31
407190 Network (HTTP) should timeout, if server does not react Core / Networking defect 16 years S4 0 7 23 0 54
371923 Show a warning when a user tries to bookmark a javascript: url Core / Security enhancement 17 years S3 10 6 35 0 21
363250 implement toggle() expression Core / CSS Parsing and Computation enhancement 17 years S3 3 28 36 0 11
362880 [reflow branch] intrinsic widths computed incorrectly for ::first-letter Core / Layout: Block and Inline defect 17 years S3 11 8 26 1 20
322617 Force master password prompt for every NR private key use Firefox / Security defect 18 years S3 0 12 32 0 42
282220 Sort domain lists (cookies, exceptions, saved passwords, etc) in reverse DNS order (optionally?) Firefox / Settings UI enhancement 19 years S3 4 19 23 0 29
227495 [RFE] Elements should fire resize events Core / DOM: Events enhancement 20 years S3 5 10 26 0 36
176304 Option to disallow scripts from hiding toolbars Firefox / Settings UI enhancement 21 years S3 2 29 19 0 24
90501 Allow sending URL instead of file to helper app based on content type Core / General enhancement 22 years S3 4 27 21 0 21
86770 ALT,SPACEBAR is not activating control menu Core / XUL defect 22 years S3 4 4 21 1 46
71895 Remove Hidden Window from Linux and Windows builds Core / XUL defect 22 years S3 0 9 46 2 30
69486 Image blocking and port numbers Core / Graphics: Image Blocking defect 23 years S3 7 4 24 0 40
45848 [AltSS] alternate user stylesheets Core / CSS Parsing and Computation enhancement 23 years S3 4 14 37 0 24
13610 ::first-letter does not inherit from ::first-line when floated Core / Layout: Floats defect 24 years S4 0 10 16 1 53
1835275 [Intel Arc A770] rendertexturehost tab crash without crash report (Nightly: WR/EGL/fluxbox X11/Intel, VAAPI force-enabled) Core / Graphics defect 9 months S3 0 0 9 2 67
1660185 Show Collections in Desktop version of Firefox Firefox / General enhancement 3 years -- 0 18 42 2 20
1621763 [flatpak] Support native messaging Core / Widget: Gtk enhancement 3 years N/A 3 9 52 2 16
1608485 1080p 60fps Fullscreen videos stutter with double-buffering Core / Graphics defect 4 years S4 1 1 18 3 54
1407238 Cli argument for print page or generate pdf command in Firefox headless mode Firefox / Headless defect 6 years S3 0 21 35 0 25
1403823 High CPU on twitch TV stream Core / Audio/Video: Playback defect 6 years S3 3 5 35 2 33
1259924 [quirks mode] mousemove fails because <body> element height doesn't fill the viewport Core / Layout defect 7 years S3 9 1 22 5 27
1143003 IndexedDB open via file:// fails with long file paths, provide an error message explaining why. Core / Storage: IndexedDB defect 8 years S3 0 2 23 0 58
1034526 New Sync should have an option to encrypt data with a secret that's not used for anything else and never entered into a Web page Firefox / Sync enhancement 9 years S3 4 8 38 1 28
1006102 Log error messages from add-on scripts to the add-on console DevTools / Debugger defect 9 years S3 5 5 20 0 44
1003896 Provide a way to allow <input type=number> to display its number using a fixed number of decimal places (append trailing zeros if necessary) Core / Layout: Form Controls enhancement 9 years S3 0 14 31 0 37
990804 Add a generic way to run some small piece of code off the main thread without requiring people to spawn their own threads Core / XPCOM defect 9 years S3 0 0 28 0 56
985024 Show all bookmarks should not scroll with the bookmarks menu contents Firefox / Bookmarks & History defect 9 years S3 11 3 25 1 25
976521 Implement usage of "b=as" parameter to control outbound bandwidth for WebRTC Core / WebRTC enhancement 10 years -- 1 19 22 4 26
869690 Always show the @value for datalist options even when they have a label (show both the label and the value) Toolkit / Autocomplete enhancement 10 years S3 1 6 29 0 45
701029 Error: uncaught exception: Error: Permission denied for <> to get property Proxy.InstallTrigger Firefox / General defect 12 years S3 0 23 28 0 28
665000 Playback of javascript mp3 decoder suffers in quality when tab loses focus Core / DOM: Core & HTML defect 12 years S3 1 4 20 1 54
588317 Convert popup blocked bar and icon to a location bar lucky charm Firefox / General defect 13 years S3 1 15 39 0 27
559561 When focused element is removed, fire blur event on it Core / DOM: UI Events & Focus Handling defect 13 years S3 4 4 25 3 38
471658 Disable Private Browsing mode when parental controls are enabled Firefox / Private Browsing enhancement 15 years S3 0 0 24 1 58
449235 Find/Search feature doesn't find text that is present in an XML document upon the first search. Toolkit / Find Toolbar defect 15 years S3 5 14 20 0 32
423749 Redirection warning should provide ability to permanently allow redirects for a given website Firefox / General enhancement 15 years S3 7 28 15 0 14
340814 Highlighted text stays highlighted when closing the Find Toolbar Toolkit / Find Toolbar enhancement 17 years S3 3 5 21 2 45
334500 copy/paste broken with Registry entry AppInit_DLLs at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Firefox / General defect 17 years S3 7 3 24 0 39
321022 Mixed secure / nonsecure content warning does not allow to block insecure content Firefox / Security enhancement 18 years S3 3 11 27 0 35
242829 hyperlinks and form controls in a <caption> can't be tabbed to Core / DOM: UI Events & Focus Handling defect 19 years S4 5 14 19 0 34
198233 Ctrl+NumPad 0 does not restore Text Zoom to 100% if NumLock is off Core / DOM: UI Events & Focus Handling defect 20 years S4 5 10 20 0 38
196078 Browser should render unrecognized text/* as text/plain Firefox / File Handling defect 21 years S3 5 16 24 2 24
193025 Pref "layout.word_select.stop_at_punctuation" can't be set in user's user.js. Core / DOM: Selection defect 21 years S4 0 4 21 0 57
144517 A frame is only created for the first of multiple table-captions, and only when at start (?) of table Core / Layout: Tables defect 21 years S3 5 3 27 1 39
97223 tabbing to element (focusing it by keyboard) should bring tooltip (contents of title attribute) up Core / DOM: UI Events & Focus Handling enhancement 22 years N/A 3 10 29 2 31
84973 make clipboard async -- otherwise paste from remote apps can fail. Core / DOM: Selection defect 22 years S3 7 10 32 0 24
1758773 MITM in Russia Core / Security Block-lists, Allow-lists, and other State task 1 year, 11 months N/A 0 7 54 1 25
1755231 [Partial scale] Missing cursor scale - Mouse pointer tiny on Firefox 96/Wayland/Ubuntu 21.10 Core / Widget: Gtk defect 2 years -- 4 0 23 2 45
1729779 OOM (comment 42): Glitches, crashes and slowness with webrender (Chinese/Japanese/Korean characters) with low memory Core / Graphics: WebRender defect 2 years S3 0 1 9 3 60
1697982 Firefox Tracking Protection should protect against URL/queryparam-based tracking (like ClearURLs/NeatURL addons do) Core / Privacy: Anti-Tracking enhancement 2 years -- 0 28 29 1 16
1661935 Support NativeMessaging in Snap WebExtensions / General enhancement 3 years S2 4 5 33 6 22
1655525 Using <embed> for PDFs does not result in a download if PDF.js is disabled Firefox / PDF Viewer defect 3 years S2 4 1 21 7 35
1502457 Contextual Feature Recommender (CFR) and other "nightly/local"-only features uses "default" to select cohort Firefox Build System / General defect 5 years S3 1 0 29 1 48
1473601 Investigate caching favicon requests better. Firefox / Tabbed Browser enhancement 5 years S3 0 54 8 0 2
1397624 Provide an option for first-party isolation in Private Browsing Mode Firefox / Private Browsing enhancement 6 years S3 0 3 11 5 52
1334655 PCompositorBridge::Msg_WillClose can block the UI thread when closing a window Core / Graphics: Layers defect 7 years S3 0 4 29 0 48
1304650 Firefox use wrong default applications to open files in KDE5 Core / Widget: Gtk defect 7 years S3 4 5 24 1 39
1288858 Should custom containers be synced across devices? Core / DOM: Security enhancement 7 years S3 2 13 41 1 21
1259818 No keyboard shortcut for Firefox Menu (AKA as hamburger menu) Firefox / Keyboard Navigation defect 7 years S3 1 11 22 4 34
1250290 Make performance timeline data available via WebDriver Remote Protocol / Marionette defect 8 years S3 0 1 30 2 46
1247245 Firefox should not autofill passwords when the form fields are invisible Toolkit / Password Manager defect 8 years S3 3 17 24 7 14
1225110 Support notification actions Core / DOM: Notifications enhancement 8 years -- 4 14 31 0 23
1039200 Add Migration for new tag tables Toolkit / Places defect 9 years S3 0 5 9 2 58
1034534 [Session Restore] Restore windows one by one Firefox / Session Restore defect 9 years S3 0 30 24 0 20
1034063 query-encoding tests are very unstable Testing / web-platform-tests defect 9 years S3 0 0 3 34 6
934640 Implement IDBFactory.databases() to enumerate IndexedDB databases Core / Storage: IndexedDB enhancement 10 years -- 0 8 31 1 39
697151 Synchronous XMLHttpRequest (XHR) does not block readyState events for async XHR Core / DOM: Networking defect 12 years S3 3 4 27 2 39
643781 Increased line heights with DirectWrite (unlike in IE9) Core / Layout: Text and Fonts defect 12 years S3 2 13 28 0 32
583299 Too many pinned tabs go off (overflow) the tab strip, especially in small windows Firefox / Tabbed Browser defect 13 years S3 11 3 22 1 24
514083 Per-file HFS+ compression on Mac OSX 10.6 Core / General enhancement 14 years S3 0 9 20 0 48
505548 No warning about contradictory "Clear history" and "Show my windows/tabs from last time" options when quitting or restarting Firefox / Settings UI defect 14 years S3 3 17 22 3 23
454660 Create a system information service Core / Widget defect 15 years S3 0 8 31 0 42
429725 Icons in the Applications Prefpane Firefox / Theme defect 15 years S3 1 5 36 0 40
404081 "Warn me when I close multiple tabs" preference can be overridden Firefox / Settings UI defect 16 years S3 2 15 30 0 29
401846 Resume fails with "Download could not be saved, because the source file could not be read" Core / Networking: HTTP defect 16 years S3 1 3 24 0 51
386591 Support "result URLs" for search suggestion results (OpenSearch) Firefox / Search enhancement 16 years N/A 0 20 21 0 35
186708 don't allow web sites to resize windows with toolbars (by default) Core / DOM: Core & HTML enhancement 21 years S3 3 14 36 0 24
125400 Release unused xul/css/xbl from the XUL Prototype cache Core / XUL defect 22 years S3 1 4 26 0 47
115500 http authentication dialog should display type of auth (basic, digest, etc.) Toolkit / General enhancement 22 years S3 3 13 27 0 30
86138 Too much network traffic on drag and drop ( use pointer service instead of XQueryTree to figure out the target of DND ) Core / DOM: Copy & Paste and Drag & Drop defect 22 years S4 6 3 22 0 41
42894 Better color picker Core / XUL enhancement 23 years S3 5 9 26 0 31
11240 JS errors in event handlers lack file and line number info Core / DOM: Core & HTML enhancement 25 years S3 6 7 25 0 33
1753933 Implement Text Fragments (formerly Scroll to Text Fragment) Core / DOM: Navigation enhancement 2 years -- 1 19 54 0 5
1706917 Verify codec configuration in conduits and codec implementations Core / WebRTC task 2 years S3 0 0 3 10 51
1704438 [QM_TRY] Failures in dom/quota/ActorsParent.cpp:QuotaManager::InitializeRepository Core / Storage: Quota Manager defect 2 years S3 0 0 3 2 67
1639280 Unacceptable performance and memory consumption on Apart Posters VR experience. Core / Graphics: CanvasWebGL defect 3 years S3 0 1 17 2 55
1558475 Intermittent Linux xserver hang with webrtc screen capture hangs user's desktop Core / WebRTC: Audio/Video defect 4 years S4 1 5 38 1 33
1488435 Significant key input delay when typing on large Google Docs Core / JavaScript Engine defect 5 years S3 1 6 27 3 36
1463527 Implement a mechanism to prevent multiple downloads Firefox / File Handling defect 5 years S3 2 2 11 3 51
1435665 input type=button background-color should be rgb(240, 240, 240) on Android. GeckoView / IME enhancement 6 years N/A 0 0 6 28 13
1433679 Firefox Sync should passively ask for the master password to be unlocked instead of forcing a modal dialog Firefox / Sync defect 6 years S3 4 7 21 3 31
1403737 All sessions can be invalidated on upgrade Firefox / Session Restore defect 6 years S3 0 22 19 0 30
1391341 stylo: Font size inherits differently than in Gecko Core / CSS Parsing and Computation defect 6 years S3 1 2 17 4 46
1378527 popups opened from a panel cause the panel to close Core / XUL defect 6 years S3 7 8 19 1 29
1370735 Insert context menu in a consistent order WebExtensions / General enhancement 6 years S3 2 13 25 3 26
1352205 Avoid running the refresh driver when the page is in background Core / Layout enhancement 6 years -- 0 7 28 5 32
1344465 Can't submit form to an http(s) URL using POST method from WebExtensions WebExtensions / General defect 6 years S3 3 3 25 3 37
1340511 Extend browsingData api for single site WebExtensions / General enhancement 7 years S3 0 18 29 2 25
1326309 Crash in AsyncShutdownTimeout | places-will-close-connection | PlacesUtils read-only connection closing as part of Places shutdown Toolkit / Places defect 7 years S3 1 0 26 0 50
1320796 Support ServiceWorkers in Private Browsing Mode Core / DOM: Service Workers enhancement 7 years S3 5 9 28 3 21
1276449 [x11] Dragging text or a tab blocks window manager keyboard shortcuts Core / Widget: Gtk defect 7 years S3 6 5 21 2 31
1268395 [oxygen-gtk3] open/upload/save file under kde is impossible because of filepicker Core / Widget: Gtk defect 7 years S3 7 4 18 3 31
1254806 Inspect Layout mochitest-chrome tests for e10s compatibility Core / Layout defect 7 years S3 0 0 25 0 54
1210990 Implement content-side hooks to handle WebRequest decisions which affect or are affected by the DOM. WebExtensions / Request Handling enhancement 8 years N/A 1 15 21 2 31
1199737 Inertial scrolling with a non precision type trackpad can zoom the webpage on Windows Core / Widget: Win32 defect 8 years S3 5 1 18 11 24
1171698 Add Casting (Chromecast) Capabilities to Desktop Firefox / General enhancement 8 years S3 0 12 36 3 25
1164389 Allow certified applications to load XDR bytecode Core / Networking: Cache defect 8 years S3 0 2 21 0 55
910144 Fullscreen: Black bar shown above Firefox when menubar has been moved to second monitor Core / Widget: Cocoa defect 10 years S3 1 6 22 3 40
873810 Background tabs can force an HTTP auth prompt over the active tab to steal the user's credentials for the currently-active website Firefox / Security defect 10 years S3 2 1 41 0 36
759342 CSS animation High CPU Core / Layout defect 11 years S3 0 11 29 1 36
648789 Opening new tab makes tab overflow scroll buttons appear momentarily (flicker) if New Tab button isn't placed right after tabs Firefox / Tabbed Browser defect 12 years S3 5 10 21 0 31
578179 Option to wrap text to screen width (rather than container width) Core / Layout: Block and Inline defect 13 years S3 3 18 33 0 18
555985 Remaining <meter> work Core / DOM: Core & HTML defect 13 years S3 0 31 33 0 9
546254 Give open-page autocomplete tab matches a higher frecency ranking (weight, priority) Toolkit / Places defect 14 years S3 7 7 27 0 27
544710 Remove "View Background Image" context menu item Firefox / Menus defect 14 years S3 0 2 23 0 52
483192 Downloaded files don't inherit NTFS compression or encryption properties from parent folder/directory Core / Widget: Win32 defect 14 years S3 5 11 25 0 28
347592 Use precompiled headers (GCC, clang, and VC) Firefox Build System / General enhancement 17 years S3 0 0 26 0 52
343999 window.home() incorrectly handles multiple home pages specified with | Core / DOM: Core & HTML defect 17 years S3 6 6 25 0 31
337801 Remove views Core / Web Painting enhancement 17 years N/A 0 20 43 0 16
190655 render <hr> in prevailing text foreground color Core / Layout defect 21 years S3 8 2 19 0 35
76828 Arrows not disappearing when reaching the top or bottom of a scrollable menu (eg bookmarks) Core / XUL defect 22 years S3 8 6 17 0 33
15438 Improve layout of wide list item markers/counters (ordered, number, clipped, overflow, truncated, fit) Core / Layout: Block and Inline defect 24 years S3 10 5 19 0 27
1854131 Three-dot main menu falls off screen, disappears in landscape mode Fenix / Toolbar defect 5 months S2 5 0 18 8 27
1852924 H3 upload Speed still slow. Three times slower than other browsers. Core / Networking: HTTP defect 5 months S2 0 4 25 4 37
1778560 High CPU and GPU usage with YouTube videos with NVIDIA GPU Core / Graphics: WebRender defect 1 year, 7 months S3 0 1 17 6 44
1774062 Ctrl+S and Ctrl+O shortcut-keys trigger too many XDG portal window when running on Xwayland, leading to resources exhaustion Firefox Build System / Third Party Packaging defect 1 year, 8 months S3 9 0 20 3 26
1773091 Expand the time that we keep autoland builds around for so that mozregression still work for regressions older than 1 year Release Engineering / General enhancement 1 year, 8 months S3 0 1 18 3 49
1725245 Add Ubuntu 22.04 as a test platform to run tests for MOZ_ENABLE_WAYLAND=1 Testing / General task 2 years -- 1 2 35 2 35
1723375 Unable to download files from Google Drive when logged into Google account Core / Privacy: Anti-Tracking defect 2 years S3 0 0 22 0 54
1652516 tvnow.de causes CPU churn likely due to many many setTimeouts Core / DOM: Core & HTML defect 3 years S3 1 0 15 2 51
1595610 webRequest.onHeadersReceived not fired for cached response after script-initiated navigation WebExtensions / Request Handling defect 4 years S3 0 2 6 2 59
1562490 Deleting large amount of bookmarks and folders hangs/locks/freezes Mozilla Firefox completely for some time Firefox / Bookmarks & History defect 4 years S3 9 6 14 0 30
1557795 Request headers/cookies/params is not visible until request is finished DevTools / Netmonitor enhancement 4 years S3 8 6 22 0 25
1546847 Multi-second UI jank/freeze when serializing SessionStore data over to the SessionFile worker Firefox / Session Restore defect 4 years -- 0 8 27 2 36
1505436 Uninstall fails when using MSI installer for the task Firefox / Installer defect 5 years S3 4 1 24 3 36
1502519 CSD regression: (Un)maximizing/snapping a window can break window content on KDE and Gnome Core / Widget: Gtk defect 5 years S3 4 1 14 10 28
1398414 Key :visited per origin (first-party-isolation for :visited). Core / CSS Parsing and Computation defect 6 years S3 1 3 26 7 30
1375585 Support WebGL in headless mode Core / Graphics: CanvasWebGL defect 6 years S3 0 4 21 3 44
1365019 Have containers isolate more things, like extensions Core / DOM: Security enhancement 6 years S3 1 14 35 3 18
1337955 Test Firefox with Rust beta and nightly toolchains Firefox Build System / General defect 7 years S3 0 0 18 3 51
1321841 Firefox network loss after connection to Cisco VPN. Core / Networking defect 7 years S3 3 0 16 3 45
1310551 orthogonal flows (vertical writing-mode inside horizontal) can produce intrinsic sizes of 0, e.g. in floats & flex items Core / Layout defect 7 years S3 8 4 17 4 23
1308039 Yield to painting during GC Core / JavaScript: GC defect 7 years S3 0 4 25 1 43
1265457 Embedded Facebook videos blocked by tracking protection set to STRICT Core / Privacy: Anti-Tracking defect 7 years S3 8 0 23 2 30
1165237 fetch() not aborted upon document unload Core / DOM: Core & HTML defect 8 years S3 0 0 11 2 58
1162562 Investigate converting Firefox to a Universal (UWP) application Core / Widget: Win32 defect 8 years S3 1 9 39 1 26
1160447 ... Core / Audio/Video: Playback defect 8 years S3 0 0 21 0 54
1055887 Update intrinsic sizing of flex containers (e.g. container max-content width) to new spec text Core / Layout: Flexbox defect 9 years S3 4 5 20 3 32
1028827 Build uses -mssse3 and fails on OS where autoconf test for -mssse3 fails Firefox Build System / General defect 9 years S3 0 0 8 2 60
1022231 Firefox doesn't remember tabs when using custom history settings, clearing history on shutdown Firefox / Session Restore defect 9 years S3 2 22 14 2 24
1019603 TLS handshake fails on CORS preflight requests because no certificate is sent [per spec] Core / Networking defect 9 years S3 0 3 31 2 39
966518 Move Proxy Handlers to Proxy JSClasses Core / JavaScript Engine defect 10 years S3 1 2 20 0 51
948956 Download-in-progress (indeterminate) is non obvious when server gives no content-length Firefox / Downloads Panel defect 10 years S3 5 0 18 0 44
812990 [css-text-decor-4] Implement text-decoration-skip Core / Layout: Block and Inline enhancement 11 years S3 0 18 29 3 20
732621 Rendering/processing in onmousemove is very laggy in fractal demo Core / Widget defect 12 years S3 0 7 25 0 42
715612 creating the DOM for hidden tabs slows down browser startup Firefox / Tabbed Browser defect 12 years S3 0 24 28 0 20
713608 HTML5 Video controls are missing in Fullscreen Toolkit / Video/Audio Controls defect 12 years S4 0 2 23 1 49
704298 Program doesn't start: XPCOMGlueLoad error for libxpcom.so, Cannot load XPCOM. Core / XPCOM defect 12 years S3 0 8 22 0 43
691973 Expired Cookies Not Removed by Cookie Manager Core / Networking: Cookies defect 12 years S3 1 15 21 0 34
572803 add UI for strict-transport-security Firefox / Settings UI defect 13 years S3 1 8 34 2 29
563540 implement aero snap for torn off Firefox tabs Firefox / Tabbed Browser enhancement 13 years S3 1 19 28 1 21
551427 Whole browser should not hang while download file is built/scanned Toolkit / Downloads API defect 13 years S3 2 8 24 0 38
469456 browser.tabs.loadInBackground and browser.tabs.loadBookmarksInBackground could be one pref Firefox / Settings UI defect 15 years S3 12 7 19 0 16
439938 Open With sets file as read-only Firefox / File Handling defect 15 years S3 0 22 24 0 24
405108 make sorting changes in places/library (session) persistent Firefox / Bookmarks & History defect 16 years S4 9 2 22 0 28
306344 Marquee should be able to animate smoothly (either via smooth scrolling or transform animations) Core / Layout enhancement 18 years S3 0 1 13 22 16
291534 Safe Mode: Need indication that user is in Safe Mode Firefox / General enhancement 18 years S3 0 12 34 0 29
279923 Assertions should be fatal Firefox Build System / General defect 19 years S3 1 4 51 0 24
254544 losing connection causes firefox to cancel downloads Toolkit / Downloads API defect 19 years S3 5 9 23 0 30
225882 Ability to pass URLs to helper apps (for streaming) instead of downloading and then passing the entire file Firefox / File Handling defect 20 years S3 4 16 19 0 27
136676 no quoting at all in MIME-Headers (Content-Disposition header not escaped) Core / DOM: Core & HTML defect 21 years S3 6 2 27 0 33
103649 Performance problems when rendering a page with hundreds of iframes Core / Layout: Images, Video, and HTML Frames defect 22 years S3 1 10 23 0 39
93787 allow security.checkloadURI exceptions via paired URL-filesystem expressions Core / Security enhancement 22 years S3 0 33 10 0 20
1864167 ... Core / DOM: Forms defect 3 months S2 2 0 14 2 48
1648947 Broken print output from Yahoo Mail, because element with "display:table" doesn't print correctly - initial blank pages, missing content, and content that runs off the page Core / Layout: Tables defect 3 years S2 5 4 18 5 26
1618563 Images browser.theme doesn't accept "moz-extension://" url WebExtensions / Themes enhancement 4 years S3 0 0 10 2 55
1541425 Implement audio capture for getDisplayMedia Core / WebRTC: Audio/Video enhancement 4 years S3 3 16 33 0 16
1475831 WebExtension: content scripts should be injected in data URL pages WebExtensions / General defect 5 years S3 0 13 20 3 30
1404743 file not found in Preloader's nsZipArchive Likely/mostly omni jar corruption Core / XPConnect defect 6 years S3 0 0 23 1 49
1401189 Console tests should be runnable via mach commands DevTools / Console task 6 years S3 0 1 17 3 47
1357205 move built-in add-ons into omni.ja Toolkit / Add-ons Manager enhancement 6 years S3 1 6 28 1 34
1353726 Consider extending browsingData.RemovalOptions to allow removal by cookieStoreId WebExtensions / General enhancement 6 years S3 0 25 19 3 16
1302891 Add Clang CFI support to build system Firefox Build System / General defect 7 years S3 0 0 22 0 50
1299117 Implement Time to First Meaningful Paint (TMP) for Telemetry/Profiler Core / Layout defect 7 years S3 0 0 28 0 46
1297353 ... Firefox for iOS / Third Party Security Issues defect 7 years S3 5 0 24 7 24
1291841 Implement contentSettings API for cookies WebExtensions / General task 7 years S3 4 14 26 0 21
1281469 Implement Certificate Transparency support (RFC 6962) Core / Security: PSM task 7 years S3 0 16 50 2 7
1213290 Enable "usercontext" on bookmarks Core / Security enhancement 8 years S3 3 13 35 0 17
1190681 Browser extension |notifications| API needs support for buttons in notifications WebExtensions / Frontend enhancement 8 years S3 1 16 38 1 15
1183245 Service worker registration should be wiped when origin storage is wiped Core / DOM: Service Workers defect 8 years S3 1 4 18 3 40
1161767 Dragging tab to new window, and then back again leaves drop indicator after drop Firefox / Tabbed Browser defect 8 years S3 7 0 20 0 36
1156047 Implement the W3C WebAppSec Credential Management API Core / DOM: Security enhancement 8 years S3 2 11 40 0 18
1136954 Build a private/hidden try server for security sensitive bug testing Release Engineering / General defect 9 years S3 4 3 33 1 28
1085214 Implement Location.ancestorOrigins Core / DOM: Window and Location enhancement 9 years S3 1 6 27 4 30
1069739 DIVs with overflow receiving focus, causing issues for accessibility user Core / DOM: Selection defect 9 years S3 0 3 21 1 45
1045992 crash in mozilla::CycleCollectedJSRuntime::DeferredFinalize(nsISupports*) Core / DOM: Core & HTML defect 9 years S3 9 1 22 0 28
914579 Add Network Service Discovery API support Core / Networking enhancement 10 years S3 1 10 37 0 24
903457 Generator functions are too slow: Baseline compile generators Core / JavaScript Engine defect 10 years S3 0 8 29 0 36
896391 memcpy from camera preview's GraphicBuffer is slow Core / WebRTC: Audio/Video defect 10 years S3 0 2 22 0 49
878346 make transform="" a presentation attribute for the transform property Core / SVG defect 10 years S3 7 2 18 1 33
847049 Printing from pdf.js rescales/resizes/shrinks output (compared to Adobe Reader printout, both at 100% scaling) Core / Printing: Output defect 11 years S3 1 10 23 1 33
790640 add Media Fragments for images (spatial dimensions) Core / Graphics: ImageLib enhancement 11 years S4 0 7 25 0 39
740910 Support cropping in the middle for text-overflow Core / Layout: Block and Inline defect 11 years S3 1 11 27 3 26
721236 Concurrent GC marking Core / JavaScript: GC defect 12 years S3 0 7 61 0 13
687311 outlines are drawn outside (expanded by) outlines on descendant elements Core / Layout defect 12 years S3 3 10 25 0 28
680289 Rumble Effect support for Gamepad API Core / DOM: Device Interfaces defect 12 years S3 1 7 30 1 32
662814 Add a low overhead, always-on, system-wide event log Core / General defect 12 years S3 0 6 32 0 35
637619 Display better error messages when HTTPS proxy servers return non-200 error codes Core / Networking: Proxy defect 13 years S3 1 4 23 1 41
636907 SpiderMonkey should provide a low-level interface in JavaScript to JS debugging Core / JavaScript Engine defect 13 years S3 0 6 29 0 39
613126 Reopened tabs not stored in history Firefox / Session Restore defect 13 years S3 4 20 19 0 18
601933 remove RFC 2047 encoding support for HTTP header field parameters Firefox / File Handling task 13 years S3 0 0 21 0 52
594681 full screen mode (F11): Menu Bar and Bookmarks Toolbar are not visible Firefox / Toolbars and Customization enhancement 13 years -- 9 8 20 1 19
550246 Centered DOM elements shift 1 pixel depending on EVEN or ODD browser width Core / Layout defect 13 years S3 1 18 15 0 32
529746 [Win] App update should request elevation when the user doesn't have privileges to update Toolkit / Application Update defect 14 years S3 4 20 26 0 12
522035 Investigate alternate behaviors for Aero Peek Firefox / General defect 14 years S3 2 5 20 0 42
516781 HTTP auth in a background tab shouldn't cause any dialogs to be displayed Firefox / Tabbed Browser defect 14 years -- 3 14 31 0 19
512188 ... Toolkit / Password Manager defect 14 years S3 0 0 17 2 51
497164 Volume settings (e.g. mute) are not persistent - always 100% after load Toolkit / Video/Audio Controls defect 14 years S3 5 13 29 0 18
462743 original size/position not always correctly update for maximized windows (can lead to restoration to the wrong monitor) Firefox / Session Restore defect 15 years S3 2 24 16 0 20
459638 Improve warning messages for multiple profile handling (was: Confusing "already running, but is not responding" error when "profile is in use"/"non-existent profile name in -P" in multi-instance environment with -no-remote) Toolkit / Startup and Profile System defect 15 years S4 0 17 20 1 29
445639 Polish the Launch Application window Toolkit / General enhancement 15 years -- 0 13 30 0 28
426727 Use consistent appearance for selected richlistitems Toolkit / Themes enhancement 15 years S3 0 11 26 0 34
395327 Mozilla should have a grammar checker. Core / Spelling checker enhancement 16 years S3 3 18 24 0 20
388664 opening link from another application raises/focuses/moves Firefox window Firefox / Shell Integration defect 16 years S3 4 9 22 1 28
250906 null (%00) in filename fakes extension (ftp, file) Core / Networking: File defect 19 years S3 0 2 24 1 45
249951 Safer handling of executable files with download manager Toolkit / Downloads API defect 19 years S3 0 14 34 0 25
91242 CSS parsing is 5.5% of startup time Core / CSS Parsing and Computation defect 22 years S3 0 14 41 0 20
57563 Should still be able to open disabled top-level menus Core / XUL defect 23 years S3 7 1 15 0 38
1869503 Crash in [@ EdgePool::Iterator::operator*] Core / Cycle Collector defect 2 months S2 1 0 60 1 15
1852554 Firefox Nightly Snap identifying different invocation methods as different processes and assigning separate profiles. Firefox Build System / Third Party Packaging defect 5 months -- 0 0 4 4 54
1810550 Tabs use "excessive" CPU when application is backgrounded Fenix / Browser Engine defect 1 year, 1 month S3 0 0 28 3 39
1800596 "Open Image in New Tab" on very large data URL (11MB) is very slow or crashes browser Core / Layout: Images, Video, and HTML Frames defect 1 year, 3 months S3 0 0 12 11 34
1752655 Slack issues on session restore: custom font not loaded, sidebar with thread conversation broken or: "For some reason, Slack couldn’t load" Core / DOM: Service Workers defect 2 years S3 2 0 23 2 40
1734371 Firefox snap can't load PKCS#11 modules on the host system Firefox Build System / Third Party Packaging defect 2 years S2 0 0 34 4 31
1675068 Service workers delaying shutdown Core / DOM: Service Workers defect 3 years S3 0 3 18 2 45
1658766 Page load for about:logins is slow on Windows Firefox / about:logins defect 3 years S3 1 0 16 4 42
1634906 Some users are disturbed by about:logins search looking up typed characters in passwords (especially with a primary password) Firefox / about:logins enhancement 3 years S4 11 1 18 2 19
1600698 [JITSI] bandwith usage and status info Core / WebRTC enhancement 4 years S3 0 16 49 0 8
1582021 Fonts are rendered very fuzzy in 69 with resistFingerprinting on Core / DOM: Security defect 4 years S3 2 0 13 4 43
1544413 Broken SVG with large coordinates (with Skia and WebRender backends, though not with Cairo) Core / Graphics: WebRender defect 4 years S3 7 0 19 3 28
1538072 ... Core / Security task 4 years S3 2 0 20 1 42
1528603 The user should be able to view and clear CORS cache Core / Networking defect 5 years S3 0 1 28 1 42
1475518 Commit-space usage investigation Core / General enhancement 5 years S3 0 5 60 0 13
1470011 .tar.gz files mangled on download by double compression Core / Networking defect 5 years S3 1 2 21 4 37
1427535 Address bar/Location bar/urlbar drops first few letters when typing immediately after opening a new tab with a custom new-tab URL Firefox / Address Bar defect 6 years S3 0 10 20 6 25
1418178 more than six thumbnails needed when Ctrl+Tab is used Firefox / Tabbed Browser enhancement 6 years S3 1 8 26 1 30
1403483 First tab separator should not span full height when drag space / menu bar is enabled Firefox / Theme defect 6 years S3 7 1 13 0 37
1328497 stylo: Optimize codesize Core / CSS Parsing and Computation defect 7 years S3 0 2 26 0 42
1323414 Add streaming support to downloads WebExtensions / General enhancement 7 years S3 0 21 28 1 17
1291467 Implement contenteditable="plaintext-only" Core / DOM: Editor enhancement 7 years S3 1 6 30 5 23
1268599 touch screen drag and scroll on linux does not work even with gtk3 in ubuntu 16.04 Core / DOM: UI Events & Focus Handling defect 7 years S3 1 7 22 1 34
1254560 Scrolling page with acceleration in print preview on Windows flashes page w/ an Intel HD GPU Core / Layout defect 7 years S3 0 1 12 4 46
1177516 Ensure that default bookmarks aren't duplicated Firefox / Sync defect 8 years S3 4 3 18 4 30
1120684 Recipes that allow login credentials to be used across multiple domains (i.e., realms) Toolkit / Password Manager enhancement 9 years S3 7 7 18 0 24
1034038 [Session Restore] Inform the user when Session Restore cannot save the session Firefox / Session Restore defect 9 years S3 0 31 20 0 12
1027106 Make ImageLib share cached imgRequests for the same SVG document even if the URI has a different ref/hash Core / Graphics: ImageLib defect 9 years S3 3 7 26 1 27
1007251 Save Page As... > Web Page, complete does not save .htm / .html file on some sites Firefox / File Handling defect 9 years S3 0 4 17 3 40
984012 Consider removing the security.turn_off_all_security_so_that_viruses_can_take_over_this_computer pref Core / XPConnect defect 9 years S3 0 1 27 4 36
888177 Implement ImageCapture API Core / WebRTC: Audio/Video defect 10 years S3 0 5 35 0 32
883884 [RTL] text-overflow:ellipsis and text-overflow:<string> work incorrectly for bidi text Core / CSS Parsing and Computation defect 10 years S3 3 2 17 4 33
836814 Cannot seek in media resources accessed via JAR/APP protocol URIs Core / Networking defect 11 years S3 0 1 23 0 46
827937 Opening huge mercurial long commit page freezing Firefox Core / Layout defect 11 years S3 3 3 30 0 31
661590 Repeated calls to location.hash = "#foo" cause large amounts of disk activity Toolkit / Places defect 12 years S3 3 4 37 1 22
592786 Peacekeeper test arraySplice 37 times slower in Firefox compared to Chrome Core / JavaScript Engine defect 13 years S3 1 7 22 0 38
576347 Periodically purge expired cookies and vacuum db Core / Networking: Cookies defect 13 years S3 1 21 27 0 15
569331 WidgetQueryContentEvent should be able to query whole contents of the focused document if it's requested by the dispatcher Core / DOM: Events defect 13 years S3 0 11 20 0 37
549419 Anisotropic filtering makes fonts blurry when using direct2d. Core / Graphics defect 14 years S3 0 12 19 0 35
442139 Uneven line-height for non-integer values (should round/snap line-height to device pixels) Core / Layout: Text and Fonts defect 15 years S3 4 7 25 0 27
426849 No quit confirmation when only one single tab is open. Too easy to Ctrl-Q and exit/close. Firefox / General defect 15 years S3 4 10 23 2 20
318775 Accessing local files from Intranet pages Firefox / Security enhancement 18 years S3 0 22 13 0 28
298127 regular expressions support in Find Toolbar Toolkit / Find Toolbar enhancement 18 years S3 7 17 19 0 13
293323 Spotlight Integration Firefox / Shell Integration defect 18 years S3 1 21 33 0 11
273968 "View page source" on "xul" error page re-renders error page in view source window, instead of showing source Core / DOM: Navigation defect 19 years S3 4 7 30 0 24
243572 Annoying confirm dialog on every request to site when using a user:password URL Core / Networking: HTTP enhancement 19 years S3 7 6 20 0 25
208427 <input>'s hidden DIV shows up as event.originalTarget in click events Core / DOM: Events defect 20 years S3 2 12 22 0 29
203686 [BC] border collapse code how to proceed? Core / Layout: Tables defect 20 years S3 0 11 24 0 33
179658 clean up external DnD selection target type handling [gtk] Core / XUL defect 21 years S3 2 4 25 0 35
179596 Lists which contain consecutive list items which contain only whitespace (i.e. empty) render the list items without advancing the vertical position Core / Layout: Block and Inline defect 21 years S4 5 2 21 0 34
175415 multiple generic fonts (font: monospace,serif) cause unexpected variation of font-size Core / CSS Parsing and Computation defect 21 years S3 2 12 17 1 31
51202 Dynamically determine optimum incremental reflow interval Core / Layout enhancement 23 years S3 0 18 34 0 16
38121 "save as" should convert line breaks depending on platform Firefox / File Handling defect 23 years S3 6 2 9 0 41
1853107 Tab freezes, in part the contents of an adjacent tab are displayed, in part the tab contents are completely black Fenix / Tabs defect 5 months S3 0 0 12 4 46
1849109 Context menu broken with widget.wayland.fractional-scale.enabled Core / Widget: Gtk defect 6 months -- 1 5 33 0 29
1838541 Full screen video exits browser and UI becomes unresponsive, UI moves to top right quarter of screen GeckoView / Media defect 8 months S2 3 0 21 2 36
1838401 Regression in text scaling - layouts breaking Core / Layout: Scrolling and Overflow defect 8 months S3 1 0 14 3 43
1801098 Page contents are moved after scrolling to the bottom/ top of the Bugzilla page while using the scroll bar or the auto-scroll Core / Panning and Zooming defect 1 year, 3 months S3 1 4 20 6 28
1741145 TabStateFlusherInternal.flush throws intermittently Firefox / Session Restore defect 2 years N/A 0 0 1 29 3
1727480 ... Core / DOM: Core & HTML defect 2 years S3 0 0 8 2 53
1716849 Segmentation fault in ExtensionsParent::RecvStateChange during session restore Core / DOM: Navigation defect 2 years S3 1 0 16 3 43
1708119 [QM_TRY] Warnings in dom/localstorage/ActorsParent.cpp:LoadUsageFile Core / Storage: Quota Manager defect 2 years S3 0 0 4 2 55
1694904 Crash in [@ mozilla::net::DocumentChannel::SetLoadFlags] with reason DocumentChannel::SetLoadFlags: Don't set flags after creation Core / DOM: Navigation defect 3 years S2 1 0 15 2 44
1672389 Can't print to receipt printer citizen ct-s310II since v82 Core / Printing: Setup defect 3 years S3 0 0 12 3 47
1670725 truncate URL bar from the front, preserve the important parts of the domain Fenix / Toolbar defect 3 years S3 5 0 19 7 22
1645136 ... Core / Graphics: CanvasWebGL defect 3 years S3 0 0 30 1 39
1568313 Textarea wrap=hard does not actually insert newlines when posting Core / DOM: Forms defect 4 years S3 4 1 21 0 36
1548572 Add fixed network latency / bandwidth to raptor tp6 pageload tests Testing / Raptor enhancement 4 years S3 0 0 16 4 42
1529575 Investigate races between discardBrowser() and AsyncTabSwitcher.jsm Firefox / Tabbed Browser defect 5 years S3 0 44 4 0 4
1506100 javascript: protocol URLs typed into the address bar no longer work Firefox / Address Bar defect 5 years S3 1 7 21 4 27
1492303 PDF rendering at high zoom levels is blurry Firefox / PDF Viewer defect 5 years S2 2 13 24 5 13
1467697 Loading page is x2 slower than chrome Core / JavaScript: GC defect 5 years S3 0 3 20 0 44
1461724 [ARM/ARM64] Crash in js::jit::MaybeEnterJit (SIGILL/SIGSEG on Xperia X/Xperia Z5/Galaxy S6/Galaxy S2 Tab) Core / JavaScript Engine: JIT defect 5 years S3 4 0 15 2 38
1460412 API to set the new tab page URL WebExtensions / Frontend enhancement 5 years S3 0 14 35 1 17
1433292 Make browser.permissions.request() reject when it can't find the browser window to anchor the notification WebExtensions / Frontend enhancement 6 years S3 0 0 19 3 43
1427543 make signon.autofillForms = false the default Toolkit / Password Manager task 6 years S3 5 5 26 1 21
1425916 Very high CPU usage on MacOS (profile included) Core / Web Painting defect 6 years S3 1 2 22 4 34
1325335 Integrate HACL* EdDSA over Curve25519 NSS / Libraries defect 7 years S3 2 8 32 0 23
1280189 [Fetch] "NetworkError when attempting to fetch resource" exception when redirecting Core / DOM: Networking defect 7 years S4 0 2 30 0 38
1273012 Bookmarks popup would not scroll with mouse wheel when mouse pointer on a folder Core / Widget defect 7 years S3 3 2 21 1 34
1196364 Proper handling for wildcard certificates for all tlds NSS / Libraries enhancement 8 years N/A 3 0 16 3 37
1187118 Add a GIF MediaDecoder to allow playback of animated GIFs in the <video> element Core / Audio/Video: Playback defect 8 years S3 0 6 20 2 37
1140402 develop an interface for grammar checkers Core / Spelling checker defect 8 years S3 0 10 27 1 28
1108325 Switch box-model colors to prettier theme-colors DevTools / Framework defect 9 years S3 2 0 9 2 46
1107251 TCP client connections (e.g., HTTP) hang with moderate CPU load when server is not reachable (e.g., misconfigured proxy) Core / Networking: Proxy defect 9 years S3 0 3 13 2 44
1083418 on Nightly, all the humble bundle games seem to GC every 5 seconds or so Core / JavaScript Engine defect 9 years S3 0 1 21 0 46
1007817 WebRTC fails with error in a Panel created from the add-on sdk Firefox / Site Permissions defect 9 years S3 1 4 22 1 36
968123 Hidden CSS background gif (completely covered by opaque child <img>) activates the refresh driver Core / CSS Parsing and Computation defect 10 years S3 3 6 22 4 24
941241 Displaying a better error message when severs send application/vnd.wap.xhtml+xml content type to Firefox OS and Firefox Android Core / DOM: Core & HTML defect 10 years S3 0 0 8 13 30
758999 Font size changes when pasting cells from LibreOffice Calc Core / DOM: Editor defect 11 years S3 1 7 23 0 35
719410 Blurry font rendering with ClearType disabled in Windows and hardware acceleration enabled in Firefox Core / Graphics defect 12 years S3 0 7 20 0 39
715378 Do cost accounting of setTimeouts to punish cpu hog background tabs Core / DOM: Core & HTML defect 12 years S3 0 20 25 0 18
702678 Overhaul existing print preview tests and make them run unconditionally Toolkit / Printing defect 12 years S3 1 2 34 0 31
674483 Master password dialog is not related/linked with browser window causing it to open above other windows Core / Security: PSM defect 12 years S3 6 7 21 1 20
666713 Dynamic analysis of chrome->content operations in Firefox Core / General defect 12 years S3 0 3 26 0 38
611569 Only display the "Page Style" menu from the view menu when invoked with the keyboard Firefox / Menus defect 13 years S3 0 0 30 0 41
599788 Add-ons addressing extension menus should work with both traditional and new-style menu Firefox / Menus defect 13 years S3 2 5 30 0 28
598202 Significant Zimbra perf regression due to d2d Core / Graphics defect 13 years S3 0 3 20 0 44
566514 Links opened in new tab should inherit history from opener Firefox / Tabbed Browser defect 13 years S3 3 19 28 0 10
555755 Sync password manager timestamps and other metadata Firefox / Sync defect 13 years S3 2 3 18 2 36
485887 File upload using the standard upload control keeps file open (perhaps also a file handle leak) Firefox / File Handling defect 14 years S3 1 3 27 2 31
482298 Implement ES5 strict mode Core / JavaScript Engine task 14 years S3 1 8 35 0 23
416766 Contextmenu event disabled for some input elements in editor mode Core / DOM: Editor defect 16 years S3 1 17 25 0 20
379272 Dragging and dropping a non-button element leaves it matching :active Core / Layout defect 16 years S3 8 2 25 1 20
374292 Remove F7 keyboard shortcut for switching caret browsing on Toolkit / UI Widgets defect 16 years S3 5 3 23 1 28
371323 Implement the `:nth-col()` and `:nth-last-col()` pseudo class for table cells Core / CSS Parsing and Computation enhancement 17 years S3 0 24 35 1 4
363698 firefox chews CPU on large table Core / Layout: Tables defect 17 years S3 0 4 24 0 40
311223 Mail or news composition (new or reply) grabs 85-95% system resources (processor / cpu) Core / XUL defect 18 years S3 4 6 20 0 30
305797 Firefox installer / uninstaller screens ignore system font size Firefox / Installer defect 18 years S3 4 2 23 0 33
237842 Perf: malformed page with many <select>'s slows Gecko down terribly Core / DOM: Core & HTML defect 19 years S3 0 9 20 0 37
230214 doesn't implement the HTML-DOM for XHTML created as the result of an XSLT Transformation Core / XSLT defect 20 years S4 3 14 16 0 26
135040 fix imagemaps so they don't misuse the primary frame mapping Core / Layout: Images, Video, and HTML Frames defect 21 years S3 0 6 24 3 30
118683 XUL boolean attributes only work when set to "true" Core / XUL defect 22 years S3 8 4 14 0 26
57399 should support 'rel' and 'rev' of <A> element (e.g. default next link for each page) Core / Layout enhancement 23 years S3 1 14 18 0 28
38933 Warn before using foreign authentication/cookies/POST data Core / Security defect 23 years S3 0 10 22 0 33
38646 mousedown on something draggable shouldn't give focus to mozilla Core / XUL defect 23 years S3 6 3 19 0 30
1858022 Scrolling jumps back and forth in the Facebook feed. Core / Panning and Zooming defect 4 months S3 0 1 20 1 43
1825910 Tapping on push notifications opens a new about:blank page Fenix / Push defect 10 months S2 1 0 17 3 40
1774315 Consider dropping ClampAndAlignWithPixels in nsGfxScrollFrame.cpp Core / Layout: Scrolling and Overflow task 1 year, 8 months S3 0 2 14 7 34
1756203 Users need a way to increase the size of overlays/menus that come from web content but are styled as browser UI (e.g. datetime-picker, text-input datalist, alert(), prompt(), tooltip) Firefox / Disability Access defect 2 years S2 3 2 16 2 33
1749129 Side-channel attack can deanonymize users (potential risk to journalists and activists) Core / DOM: Core & HTML defect 2 years S3 0 0 28 3 33
1726431 Rendering of extremely tall content becomes erratic after 16M device pixels height Core / Graphics defect 2 years S4 4 4 17 7 18
1725646 HTTPS-First endless loop with http redirection (web compat issue) Core / DOM: Security defect 2 years S4 4 2 16 3 30
1712096 Allow extensions to replace the response body without network activity WebExtensions / Request Handling enhancement 2 years N/A 0 10 24 11 8
1701808 Youtube janks due to MediaSource.IsTypeSupported calls Core / Audio/Video: Playback defect 2 years S4 0 0 6 2 52
1690326 Add mappings for NS_ERROR_MODULE_WIN32 errors generated from nsLocalFileWin.cpp Core / XPCOM defect 3 years S4 0 0 4 5 48
1679671 In Background Scripts, failIfMajorPerformanceCaveat:true always fails Core / Graphics: CanvasWebGL defect 3 years S4 0 2 14 4 38
1673588 Change urlbar results so opening in a tab will open them in background, leaving the panel open Firefox / Address Bar enhancement 3 years S4 6 0 14 3 29
1668743 Pinned tabs that use ServiceWorkers and do not skipWaiting on update may fail to load at next startup due to shutdown race involving SW activation Core / DOM: Service Workers defect 3 years S3 0 3 19 6 30
1650511 URL remains in places.sqlite after deleting from bookmark (corrupt moz_origins) Firefox / Bookmarks & History defect 3 years S3 1 0 11 2 44
1644486 Crash in [@ EMPTY: no crashing thread identified; ERROR_NO_MINIDUMP_HEADER] for Android Fenix / Crash Reporting defect 3 years S2 2 0 18 6 30
1625257 Support |storage.sync| API GeckoView / Extensions enhancement 3 years N/A 2 0 54 1 12
1612995 Build Widevine for linux arm64 Core / Audio/Video: GMP enhancement 4 years S3 3 9 26 3 15
1601871 REGRESSION: Websocket connection behind HTTP proxy does not work Core / Networking: Proxy defect 4 years S3 2 1 22 2 33
1600397 Firefox prompts twice to save a password: once with the password and once with the munged client-side hash/encrypted value Toolkit / Password Manager defect 4 years S2 3 0 18 6 28
1572680 auto-scrolling leaves cursor behind overlay banner Firefox / Disability Access defect 4 years S3 0 1 11 2 47
1549018 create a transition plan to prepare for the add-on signing root expiring in 2025 Toolkit / Add-ons Manager task 4 years S3 0 1 31 4 28
1547181 Implement Page Zoom feature (reflow-style zoom) Core / Layout enhancement 4 years S3 3 3 24 4 22
1541601 Very very very carefully... remove channel-prefs.js and stop reading it from the main thread early on startup Toolkit / Startup and Profile System defect 4 years S3 0 0 21 1 43
1505960 UX problem with tab.discard restore via tab focus Firefox / Tabbed Browser defect 5 years S3 1 30 15 0 10
1495868 Unprefix -moz-fit-content and -moz-available keywords Core / Layout task 5 years S3 3 7 27 6 11
1452144 Reinstate a Custom URL setting for New Tab Firefox / New Tab Page enhancement 5 years S3 3 6 27 4 18
1420699 Firefox uses a lot of CPU on MacOS Core / General defect 6 years S3 2 4 24 2 28
1413615 consider allowing service workers when cookie policy is "keep until I close firefox" Core / DOM: Service Workers defect 6 years S3 2 5 29 1 26
1401091 Title of new tab not updated after redirect or location.replace when target page has no <title> Firefox / Tabbed Browser defect 6 years S3 7 1 20 4 18
1370516 NSS should be initialized off main thread Core / Security: PSM enhancement 6 years S3 1 7 26 3 22
1354151 No revalidation - Cache ignoring timeout (+profile dependent?) Core / Networking: Cache defect 6 years S3 0 0 16 2 43
1352686 Video doesn't play normally when I try to scroll the page Toolkit / Video/Audio Controls defect 6 years S3 0 1 9 2 48
1347867 Crash in CrashReporter::OOPInit (Quick Heal Antivirus SCDETOUR.DLL) External Software Affecting Firefox / Other defect 6 years S3 0 1 18 2 41
1330816 Support closing synced tabs that are open on other devices Firefox / Sync enhancement 7 years S3 5 6 25 3 16
1323873 Support assigning a different user context on navigation to a new page in an existing tab, leave past history entries unchanged Core / DOM: Security enhancement 7 years S3 1 9 32 1 19
1307024 [Perf] [google docs] Firefox will get 3~9% faster when running gdoc test cases with chrome user agent Core / General defect 7 years S3 0 5 33 0 30
1306752 Scrolling does not work with Elantech Touchpad/Trackpoint and e10s enabled Core / Widget: Win32 defect 7 years S3 0 1 24 1 39
1303739 Warn when downloading executable files over HTTP Firefox / Downloads Panel defect 7 years S3 3 8 23 2 22
1273836 Copy-Paste of simple HTML adds extra new lines that are not present in original content Core / Layout: Text and Fonts defect 7 years S3 0 5 26 1 32
1100252 Dedicated graphics forced and not released on OS X dev edition and nightly debug builds Core / Graphics defect 9 years S3 3 4 20 0 32
1059392 Switch default pinning enforcement level to strict Core / Security: PSM defect 9 years S3 1 8 23 0 30
1037984 Website causes Firefox to completely hang because same script file is getting loaded over and over again Firefox / New Tab Page defect 9 years -- 0 1 22 0 43
1019721 Native promises tracing DevTools / General defect 9 years S3 0 3 24 1 37
941146 NS_ERROR_FAILURE when other browsers work fine when setting font on a canvas context in a display:none iframe Core / Graphics: Canvas2D defect 10 years S3 1 6 25 1 29
933679 Private browsing is breaking option "Show my windows and tabs from last time" Firefox / Session Restore defect 10 years S3 3 21 12 2 12
889571 Can't search in multiple sources in the Style Editor DevTools / Style Editor enhancement 10 years S3 5 10 24 1 16
831926 can't create a peer connection on without network connection Core / WebRTC: Networking defect 11 years S4 1 2 17 2 37
750979 Offer profile reset option upon re-installation of the same application version Toolkit / General defect 11 years S3 0 4 23 0 37
739176 No sub-pixel rendering while transitioning translate transforms Core / Layout defect 11 years S3 0 7 25 0 33
733954 Option to Preserve Last-Modified Date on Downloaded Files Toolkit / Downloads API enhancement 11 years S3 0 25 21 0 12
725221 setting .textContent to the same value it currently has causes invalidation Core / Layout defect 12 years S3 0 0 27 0 41
691645 IE Maze solver painting is slow Core / Web Painting defect 12 years S3 0 10 23 2 27
612029 document.write(document.body.innerHTML) DOS Attack (hang with 100% CPU) (exploit-db 15498) (missing slow script dialog) Firefox / General defect 13 years S3 10 1 16 0 21
584652 Add support for libjpeg-turbo colorspace conversions Core / Graphics: ImageLib defect 13 years S3 0 7 26 0 32
580070 New JSClass-based DOM bindings Core / DOM: Core & HTML defect 13 years S3 0 15 47 0 7
568313 Impossible to make <button>s draggable Core / DOM: Copy & Paste and Drag & Drop defect 13 years S3 2 6 29 2 21
446670 Unable to select Checkbox, Radio and Select form elements in designMode=true in FireFox 3.x Core / Layout defect 15 years S3 1 11 21 0 28
381770 Should be able to undo changes in bookmarks from browser window (not only in Library) Firefox / Bookmarks & History enhancement 16 years N/A 5 7 17 1 24
380573 implement SVG 'pointer-events' property for all elements Core / Layout defect 16 years S3 0 8 29 0 28
366325 temporary filenames do not handle multiple extensions (.tar.gz) Core / XPCOM defect 17 years S3 5 5 14 1 28
345135 Session restore shouldn't throw away form data even if there's no form on the page to restore the data into Firefox / Session Restore enhancement 17 years S3 0 31 17 0 8
333208 Can't control/limit sound volume Firefox / Settings UI enhancement 17 years S3 4 15 17 0 19
297959 Table-based video doesn't work fast enough Core / DOM: Core & HTML defect 18 years S3 0 9 34 0 22
279188 View Saved Form Information Firefox / Settings UI enhancement 19 years S3 5 15 11 0 20
274432 When dragging text to search bar, mouse over search engine should show list of search engines, and allow dropping text onto one to search that engine Firefox / Search enhancement 19 years N/A 1 12 23 0 24
266590 Many XUL bindings make bogus assumptions about when constructors fire Core / XUL defect 19 years S3 0 3 33 0 32
250123 listbox.appendItem("abc", 123).value === undefined, ditto for .label property, if listitem never visible Core / XUL defect 19 years S3 4 7 24 0 22
185905 Need better sound for typeaheadfind Toolkit / Find Toolbar defect 21 years S3 3 3 20 0 34
167396 Can't select text w/ mouse, and can't unselect after "Select All": RFE: pref to prevent JS blocking text selection Core / DOM: Selection enhancement 21 years S3 3 13 21 1 19
150025 Domain Guessing: Internet Keywords: exclude "localhost" from any "smart browsing features" Core / DOM: Navigation defect 21 years S3 6 3 17 0 28
104618 Printing should automatically use printer friendly alternate version (LINK) Core / Printing: Output enhancement 22 years S3 2 11 22 1 23
91520 Find should default to wrap around == true Toolkit / Find Toolbar enhancement 22 years S3 2 5 20 0 33
35146 Underlines retain color while being selected Core / DOM: Selection defect 23 years S4 6 2 14 0 33
1876192 Firefox occasionally hanging on Windows 11, stuck doing something in UIAutomationCore.DLL during `KiUserCallbackDispatch`, due to Windows 11 Suggested Actions Core / Disability Access APIs defect a month S3 0 0 5 6 41
1860752 The APT index of packages.mozilla.org is too large Release Engineering / General defect 4 months S2 0 0 6 2 49
1808750 Send tab to device without opening the browser Fenix / General enhancement 1 year, 1 month N/A 1 0 59 0 11
1806400 Unreliable :active state, on android device with touchscreen and touchpad Core / Panning and Zooming defect 1 year, 2 months S3 0 1 10 2 44
1797558 Navigation from extension page to another extension page results in a unusable tab on Fenix (and RefBrow) GeckoView / Extensions defect 1 year, 4 months S2 0 0 14 6 34
1755786 OSKeyStore.jsm needs to use unique key labels per profile Toolkit / Form Autofill defect 2 years S2 5 1 13 4 27
1729459 Floating-Point Normalization breaks build on 32bit Linux Core / JavaScript Engine defect 2 years S4 3 0 25 0 31
1711049 Require user interaction for all but the first download from a page to prevent download spam Firefox / Downloads Panel enhancement 2 years -- 5 1 17 5 20
1706583 Make Page Actions customizable again Firefox / Toolbars and Customization enhancement 2 years S3 2 10 16 4 19
1703040 MOZ_ALWAYS_TRUE(isNodeContainedInRange) diagnostic assertion crash in [@ mozilla::ContentSubtreeIterator::InitWithRange] Core / DOM: Selection defect 2 years S3 0 0 11 2 46
1701443 Favicons are hidden when media is present on page and hovering over tabstrip, making it harder to find tabs Firefox / Tabbed Browser defect 2 years -- 2 12 22 1 20
1684224 Poor performance in webgl aquarium demo (even with EGL/DmaBuf) Core / Graphics: CanvasWebGL defect 3 years S3 0 1 26 2 32
1586072 Password Manager using Secret Service Toolkit / Password Manager enhancement 4 years N/A 3 14 31 0 10
1561974 Intermittent dom/canvas/test/webgl-conf/generated/* | getError expected: NO_ERROR. Was OUT_OF_MEMORY Core / Graphics: CanvasWebGL defect 4 years S3 6 0 1 0 42
1554399 incorrect media sort by size in view page info Firefox / Page Info Window defect 4 years S3 4 4 22 0 26
1552445 focus loss on keyboard layout switch Core / Widget: Gtk defect 4 years S3 2 0 17 2 36
1526688 Show instance constructor name in console instead of "Object" DevTools / Console defect 5 years S3 3 4 21 1 28
1494172 [macOS] Add UI to inform user camera/mic/screen-sharing unavailable due to OS permissions Firefox / Site Permissions enhancement 5 years N/A 2 0 16 6 28
1471720 XPCOM/XPConnect should do a "canary" load of the async shutdown service (Was: fast startup crash in ServiceWorkerRegistrar::ProfileStarted) Core / XPCOM defect 5 years S3 1 0 20 2 37
1438385 Profile startup with most used antiviruses installed Toolkit / Startup and Profile System enhancement 6 years S3 0 3 17 3 34
1421345 Crash in OOM | small with BuildDisplayListForChild Core / Web Painting defect 6 years S3 0 1 17 2 40
1366330 Keep autoclose popups opened when opening a modal file picker dialog Core / XUL enhancement 6 years S3 6 9 15 2 15
1342563 Allow downloads to specify a path outside of the downloads folder WebExtensions / Frontend enhancement 7 years S3 1 9 28 0 23
1321406 Restarting with "Restore previous session" and only pinned tabs gives an unwanted Homepage tab Firefox / Session Restore defect 7 years S3 3 22 11 2 10
1271691 Adjust suppressed painting setting for a big doc Core / Layout defect 7 years S3 0 1 15 2 41
1262914 Add support for Custom Formatters in devtools DevTools / Console enhancement 7 years S3 0 15 30 2 13
1257989 WebSocket origin should have deterministic and validated origin header WebExtensions / General defect 7 years S3 2 3 20 3 28
1244237 enable Web Speech API for desktop Core / Web Speech enhancement 8 years S3 0 14 28 1 16
1199214 Clicked Link Does Not Activate Until Mouse Moved Core / DOM: UI Events & Focus Handling defect 8 years S3 0 0 10 2 45
1163959 Percent decoding in URL bar can make certain sites no longer visible Firefox / Address Bar defect 8 years S3 2 3 17 3 31
1116391 Add "Look Up in Dictionary" context menu entry [Mac OS X] Firefox / Menus enhancement 9 years S3 2 5 34 0 20
1113636 Consider Increasing JavaScript source compression to reduce memory usage Core / JavaScript Engine defect 9 years S3 0 2 44 1 20
1007286 Using keyboard on inputs causes viewport to resize, shrinking elements that are sized with viewport units (vh), or with a percent-height resolved against viewport height GeckoView / IME defect 9 years S3 1 0 25 4 29
972530 Object literals / JSON typed directly in web console do not output as expected DevTools / Console enhancement 10 years S3 7 1 18 2 21
947365 Make <input type=number>'s spinner the same height as its text input control Core / Layout: Form Controls defect 10 years S3 2 11 20 2 20
818337 Provide Usable and Effective Third-Party Web Tracking Countermeasures (Meta) Firefox / General task 11 years -- 0 14 35 0 14
752719 Interaction redesign for in-content Preferences Firefox / Settings UI defect 11 years S3 0 9 42 0 14
745549 Fading resized images with HTML <img> width/height attributes changes the image rendering Core / Layout defect 11 years S3 3 5 21 0 29
674802 CSS3 Regions Core / CSS Parsing and Computation enhancement 12 years S3 0 29 23 1 3
662496 autofocus not work when the element is added to the DOM after the document is done loading (e.g. in window.onload) Core / DOM: Core & HTML defect 12 years S4 2 5 20 4 24
661055 Show number of windows/tabs for session restore Firefox / Session Restore enhancement 12 years S3 0 26 10 0 17
630181 Implementing the Knuth and Plass line breaking algorithm Core / Layout: Text and Fonts enhancement 13 years S3 0 17 24 0 19
521435 teach gcc builds to use LTO Firefox Build System / General defect 14 years S3 0 4 22 0 35
434365 Add a commandline option to run Mochitest in a separate X server on Linux Testing / Mochitest defect 15 years S3 0 1 21 1 39
403510 Implement scrollIntoViewIfNeeded Core / DOM: CSS Object Model enhancement 16 years -- 0 14 26 1 19
379003 Make tab tooltips more detailed Firefox / Tabbed Browser enhancement 16 years S3 3 3 21 0 30
357337 Popups (tooltips) are not sized correctly for multiline tooltip Core / Layout defect 17 years S3 4 5 28 1 18
320807 Refactor URI unescape for status bar Core / Internationalization defect 18 years S3 0 5 20 0 36
311742 Inline images from scripts that use a Location: redirect should save as the redirected filename, not something like rotate.php.jpg Firefox / File Handling defect 18 years S3 4 13 13 0 21
308064 Following an on-page anchor link loses the focus Core / Layout defect 18 years S3 2 4 27 0 28
289130 Should implement text-spacing from CSS Text 4 Core / Layout: Text and Fonts enhancement 18 years S3 0 15 30 0 17
287137 support inline editing of bookmark values in the bookmarks sidebar view Firefox / Bookmarks & History enhancement 18 years S3 6 3 10 0 32
259594 "open with..." dialog box requires full pathname to choose alternative application Toolkit / Downloads API defect 19 years S3 1 13 21 1 22
249919 Print Preview breaks because of page refresh or external program creating new tab in window Toolkit / Printing defect 19 years S4 7 6 16 0 21
248648 firefox - choose user profile window too small after 1st profile created Toolkit / Startup and Profile System defect 19 years S4 9 0 17 1 21
226386 Should not change focus in onload() when the user changed it before the load is complete Core / DOM: Core & HTML enhancement 20 years S3 6 10 16 1 16
200208 back/forward buttons complain "has expired from cache" instead of showing pages visited as shown previously Core / DOM: Navigation defect 20 years S3 0 26 9 0 18
168734 download queueing for download manager Toolkit / Downloads API enhancement 21 years S3 3 15 18 0 18
127909 [UX] Fully disable links in Print Preview (no context menu, no tooltips, no color change on click) Core / Print Preview defect 22 years S4 6 6 13 1 24
117114 "-remote 'xfeDoCommand(openInbox)'" opens wrong type of window Core / XUL defect 22 years S3 7 2 13 0 27
87460 "Show Only This Frame" should prevent forced reframing Core / General enhancement 22 years S3 1 12 16 0 28
40253 Execute the download of all links (like wget --recursive) Firefox / File Handling enhancement 23 years S3 5 7 11 0 28
1851083 Manifest V3 extensions with low privilege activeTab shows annoying blue dot for all websites WebExtensions / General defect 5 months S3 0 10 26 1 20
1848474 [116 Regression with RFP and "Dark Reader" extension] Pages stop showing midway, new pages don't load, refresh stops working Core / Privacy: Anti-Tracking defect 6 months S3 0 0 14 5 34
1848266 Fullscreen videos minimizes the app and displays the device's homescreen Fenix / General defect 6 months S3 2 0 17 2 34
1793477 AV1 Decoding in YouTube Stutters on AMD Windows Laptop Core / Audio/Video defect 1 year, 4 months S3 0 1 21 1 35
1792796 Android 5.1 RTL Compose crash in [@ java.lang.ArrayIndexOutOfBoundsException: at androidx.compose.foundation.layout.Arrangement.placeRightOrBottom/placeLeftOrTop Fenix / General defect 1 year, 5 months S3 0 0 9 7 34
1782797 Stuttering smooth scrolling with mouse wheel and autoscroll Core / Panning and Zooming defect 1 year, 6 months S3 0 2 9 2 42
1739598 Mouse navigation in a specific game is severely impaired in wayland compared to the xwayland Core / Widget: Gtk defect 2 years S3 1 1 8 2 40
1737489 Nested macOS sheets (modal dialogs) cause app lock-ups Core / Widget: Cocoa defect 2 years S3 0 0 10 6 35
1719046 TCP RST will cause Firefox UI to lag or unresponsive Core / Networking defect 2 years S3 0 9 25 1 24
1701488 Implement CSS Color 5 Relative Color Syntax Core / CSS Parsing and Computation enhancement 2 years -- 0 20 35 0 4
1694802 Proton AppMenu panel becomes scrollable if the user has a low-ish resolution Firefox / Menus defect 3 years S4 3 7 17 4 17
1677509 SendReceiveMouseInputEvent often blocks the main thread of the parent process Core / IPC defect 3 years S3 0 0 21 1 36
1674359 Can't move caret cursor focus after `<table>` in `contenteditable` element if `<table>` is the last element (nor before table when it's the first element) Core / DOM: Editor defect 3 years S3 6 2 15 2 23
1610718 "www" should be excluded from URL suggestions and autofill when user types "w" Firefox / Address Bar enhancement 4 years S3 0 3 8 5 34
1575743 Create an automated test to ensure we use subpixel AA for titlebar/tabstrip/toolbar text rendering in WebRender Firefox / Theme enhancement 4 years S3 0 3 13 3 36
1535120 Crash in [@ __pthread_kill | abort | gpusGenerateCrashLog] Core / Graphics: WebRender defect 4 years S3 0 3 17 6 27
1531819 Crash in [@ OOM | large | mozalloc_abort | mozalloc_handle_oom | gkrust_shared::oom_hook::hook | std::alloc::rust_oom | webrender_bindings::bindings::wr_state_new] Core / Graphics: WebRender defect 5 years S3 3 2 20 2 25
1506865 Convert raptor-unity-webgl to a pageload test Testing / Raptor task 5 years S3 1 0 8 4 38
1505119 Consider how to improve chrome JavaScript loading/JIT-ing/running startup impact on Desktop via engine/gecko level improvements Core / JavaScript Engine enhancement 5 years -- 1 1 27 1 28
1503203 Add the three row view when docked to the side DevTools / Inspector enhancement 5 years S3 1 0 5 2 45
1498485 hubs.mozilla.com frame rate with an empty scene is too slow in FxR on Oculus Go Core / JavaScript Engine defect 5 years S3 1 2 22 2 30
1487412 Off-screen animation throttling causes stuttering in 3D transform animation Core / DOM: Animation enhancement 5 years S3 2 1 24 3 26
1479795 Crash in igd10iumd64.dll with Intel driver 23.20.16.4973 Core / Graphics defect 5 years S3 4 1 12 2 30
1468033 Homepage URL is copied into the awesomebar/urlbar on startup, interrupting the user's typing Firefox / Address Bar defect 5 years S3 7 2 12 6 15
1447524 Double session history entries from https://www.microsoft.com/en-us/news Core / DOM: Navigation defect 5 years S3 2 0 18 5 26
1445644 Input data is lost after session restore Firefox / Session Restore defect 5 years S3 0 14 18 0 23
1426058 With a custom new-tab URL, opening a new tab focuses the address bar but does not select the text WebExtensions / Frontend defect 6 years S3 1 3 20 7 20
1413874 Add mouse gestures natively Firefox / General enhancement 6 years S3 0 15 15 0 24
1402910 drag gecko hashtables into the current century Core / XPCOM enhancement 6 years S3 0 2 29 0 32
1395705 Figure out what storage can be moved to 'Local' path on Windows and what can remain in 'Roaming' Core / Storage: Quota Manager defect 6 years S3 1 1 26 0 32
1391797 Hovering inactive tab makes favicon blink Firefox / Tabbed Browser defect 6 years S3 1 1 8 2 42
1389707 ... Firefox / Screenshots defect 6 years S4 0 0 32 1 30
1356686 OMT brotli decompression Core / Networking: HTTP enhancement 6 years S3 0 5 22 1 29
1354807 Support for the IPFS protocol Core / Networking enhancement 6 years S3 0 7 34 1 19
1322437 Crash in mozalloc_abort | NS_DebugBreak | gfxFontGroup::GetDefaultFont "unable to find a usable font" Core / Graphics defect 7 years S2 0 0 12 2 43
1296922 Windows positions shifted up after restart Firefox / Session Restore defect 7 years S3 1 21 11 0 18
1277348 Inspector never loads and then can't close toolbox once it's been opened (somehow doc.write() related?) DevTools / Inspector defect 7 years S3 1 2 7 4 36
1245570 crash in EMPTY: no crashing thread identified; no frame data available (Firefox for Android only) Fenix / Crash Reporting defect 8 years S2 2 0 18 5 26
1149505 Master password prompt shouldn't be modal unless absolutely necessary Firefox / Security defect 8 years S3 5 8 17 2 16
1109851 support the "multiple searches in a row with default engine" search case (for shoppers and researchers) Firefox / Search defect 9 years S3 5 4 25 0 18
1105571 support CSS Box Alignment properties on blocks Core / Layout: Block and Inline enhancement 9 years S3 0 12 18 0 27
1031653 Always compile all C and C++ code with -fwrapv Firefox Build System / General enhancement 9 years S3 1 0 31 1 28
995020 intrinsic width of vertical multi-line flexbox is incorrect, when wrapping is needed (with flex-flow: column wrap) Core / Layout: Flexbox defect 9 years S3 3 8 17 5 16
994954 [UX] Improve the design of loading throbbers Firefox / Theme defect 9 years S3 0 3 25 0 33
963745 Downloads panel improvements Firefox / Downloads Panel enhancement 10 years S3 3 6 25 1 18
924888 Issues with legibility of tab strip Firefox / Tabbed Browser defect 10 years S3 3 4 25 0 25
907707 Security issues related to users making directories available to a page via <input type=file directory> or drag-and-drop Core / DOM: Forms defect 10 years S3 0 3 22 0 34
791941 Investigate replacing gfx/ycbcr with libyuv Core / Graphics defect 11 years S3 1 3 19 2 30
789871 The gfx.color_management.mode setting does not affect HTML5 video Core / Graphics: Color Management defect 11 years S3 3 5 24 1 22
773510 Implement undo/redo DevTools / Inspector: Rules enhancement 11 years S3 1 9 24 2 20
767197 Linux/GTK: pressing ctrl button after releasing from two finger scroll causes page zoom Core / Widget: Gtk defect 11 years S3 4 5 21 2 19
767178 Remove implicit conversion operator from mozilla::RefPtr<> Core / MFBT defect 11 years S3 0 0 15 3 38
750947 IonMonkey: Optimize Uint32 values Core / JavaScript Engine defect 11 years S3 0 9 33 0 20
729930 Firefox opens a second taskbar icon when there is already one pinned to the taskbar Firefox / General defect 12 years S3 2 3 21 1 29
722749 add source information about where a JS object was allocated in DumpHeapComplete Core / JavaScript Engine defect 12 years S3 0 5 29 0 27
711816 Larry should include a checklist of optional security measures Firefox / Security enhancement 12 years S3 3 9 32 0 11
706209 have a way to style the selection in inactive windows (apply ::-moz-selection or add similar but different way) Core / Layout: Text and Fonts enhancement 12 years S3 4 8 21 1 17
703159 Switch SVG to use Moz2D Core / SVG enhancement 12 years -- 1 15 34 0 8
658850 Avoid duplicating "firefox" as "firefox-bin" Firefox Build System / General task 12 years N/A 2 3 36 0 18
649671 browser.tabs.animate should be respected by tab close-resize & drag animations Firefox / Tabbed Browser defect 12 years S3 4 11 21 0 15
642320 Generate gdb debug info for JIT code Core / JavaScript Engine enhancement 12 years N/A 0 3 23 0 33
631462 Tooltip keep showing when switch to another application Firefox / General defect 13 years S3 1 13 15 0 24
605197 favicons should not animate if image.animation_mode=none Core / Graphics: ImageLib defect 13 years S3 1 17 19 1 16
570164 support proposed DownloadURL format string on DataTransfer object Core / DOM: Copy & Paste and Drag & Drop enhancement 13 years -- 1 8 26 0 22
565621 Let _me_ choose whether to open a link in current or new tab (open in same tab despite window.open() / target=_blank) Firefox / General enhancement 13 years S3 0 19 25 1 10
565549 Opening tabs at the end when new and next to when context-triggered is confusing — consolidate Firefox / Tabbed Browser defect 13 years S3 4 7 31 0 12
560084 Make video-like controls available for animated images Core / Graphics: ImageLib enhancement 13 years S3 4 10 24 1 13
559506 If you shift+click or ctrl+click on a label for a checkbox, checkbox is not checked. Core / Layout: Form Controls defect 13 years S3 1 6 27 1 23
536955 Firefox location bar search broken using proxy Core / DOM: Navigation defect 14 years S3 2 12 18 1 20
536540 support animation of CSS gradient values in nsStyleAnimation Core / CSS Parsing and Computation defect 14 years S3 0 19 29 0 9
534827 Page-load slow down due to browser entered favor-native-event-mode wrongly Core / DOM: Navigation defect 14 years S3 0 3 22 0 35
444399 Add Hotmail mailto protocol handler Firefox / File Handling defect 15 years S3 1 3 24 0 31
403959 Cannot resize Location bar and Search bar if they are not adjacent to each other Firefox / Toolbars and Customization defect 16 years S3 5 8 19 0 18
401172 "If you quit now [x] download(s) will be canceled" texts should be updated Toolkit / Downloads API defect 16 years S3 3 2 23 0 29
356762 Firefox doesn't prevent Windows from going into suspend mode while active downloads remain Toolkit / Downloads API defect 17 years S4 1 10 20 1 23
309217 support CSS3 content property fallback lists Core / CSS Parsing and Computation defect 18 years S3 1 21 26 0 6
299138 onerror on images not triggered when 404 response is an image Core / Graphics: ImageLib defect 18 years S3 0 13 23 0 22
279629 In page anchor links should scroll smoothly instead of jump instantly Core / DOM: UI Events & Focus Handling enhancement 19 years S3 1 4 25 0 29
248352 Preserve sort order when migrating bookmarks from IE Firefox / Migration defect 19 years S3 8 6 16 0 16
202226 Adding rule exceptions for allowing popup windows for frames and redirecting URLs Core / XUL enhancement 20 years S3 7 2 16 0 23
162369 scrolling to named anchor doesn't consider areas covered by fixed positioned elements Core / Layout defect 21 years S3 7 4 14 1 19
68402 W3C CUAP: Highlight target of intra-page [named] anchors Core / Layout defect 23 years S3 0 7 26 0 26
68074 Lots of CreateInstances of nsEventListenerManagers at startup Core / DOM: UI Events & Focus Handling defect 23 years S3 0 5 22 0 31
63107 On mouseover of submit button, show URL in status bar Core / DOM: Navigation enhancement 23 years S3 0 11 22 0 24
57451 Extreme slowness when loading long pages of text from disk Core / Layout defect 23 years S3 1 12 21 0 21
56701 Need to highlight the ACCESSKEY in HTML elements Core / Layout defect 23 years S3 0 11 20 1 25
1845917 Setting the font size above 100% from the browser settings fails to work Firefox / Disability Access defect 7 months S2 1 0 11 16 9
1839074 ... Fenix / General defect 8 months S3 6 0 16 3 19
1818194 Tab does not open when clicking on link in external application and Firefox is closed Core / Widget: Cocoa defect 1 year, 6 days S3 5 3 19 0 23
1800995 Content scripts not injected into new blank tab page (which is no longer about:blank) WebExtensions / General defect 1 year, 3 months S4 2 4 22 1 25
1791767 Replace IndexedDB connection pool thread management with task queues on top of a thread pool Core / Storage: IndexedDB task 1 year, 5 months -- 0 0 4 2 46
1770154 Reconcile old/ and new/ NotificationDB.jsm Core / DOM: Notifications task 1 year, 9 months -- 0 0 41 3 16
1711084 Scheme flooding technique for reliable cross-browser fingerprinting Core / Privacy: Anti-Tracking defect 2 years S3 1 7 29 0 20
1691729 Single-clicking the Star icon saves bookmarks in an unpredictable folder (after Bug 1432604, if not showing the panel when creating bookmarks) Firefox / Bookmarks & History defect 3 years S3 4 4 20 1 20
1688997 Add Win32 widget support for occlusion events Core / Widget: Win32 enhancement 3 years S3 2 1 24 3 23
1663634 Firefox doesn't handle body with height 100vh properly with overflow:hidden on the root element Core / Layout defect 3 years S3 5 1 16 3 21
1647721 Search suggestion for Amazon and wikipedia can timeout - Detangle fetching of local and remote suggestions Firefox / Search defect 3 years S3 3 0 9 3 33
1646063 Fixed-positioned elements (e.g. headers/footers) are included in screenshots, at unexpected places, if you happen to scroll while capturing the screenshot Firefox / Screenshots defect 3 years S4 7 2 15 1 20
1633315 sendRemoveListener on closed conduit errors spams the console WebExtensions / General defect 3 years S3 1 13 20 0 18
1621915 funky fonts in Flatpaks Core / Widget: Gtk defect 3 years S3 4 5 27 2 12
1618257 Firefox fails to load favicon from HTTP cache Core / Networking: Cache defect 4 years S3 0 4 34 1 19
1614774 Tabs become empty: the page turns white and the URL disappears from the address bar Core / DOM: Content Processes defect 4 years S3 2 1 17 2 29
1609427 Add microphone and camera to PermissionDescriptor for navigator.permissions.query Core / WebRTC: Audio/Video enhancement 4 years S3 1 1 24 1 29
1601351 Provide option in Profile Manager for links from external applications to open into last active profile window Toolkit / Startup and Profile System enhancement 4 years S3 0 7 23 0 27
1502610 Unnecessary line break when using negative margins on an inline-child of an inline-block element Core / Layout: Block and Inline defect 5 years S3 5 1 14 0 28
1472526 ... NSS / Libraries defect 5 years S4 0 0 27 2 28
1465474 Try to simplify our ::first-line implementation Core / Layout defect 5 years S3 0 3 9 5 32
1464156 Fluent shouldn't automatically fall back to en-US when some files are missing for a context Core / Internationalization: Localization enhancement 5 years S3 5 2 12 2 24
1428901 Persist TLS session tickets across browsing sessions Core / Networking enhancement 6 years S3 0 0 22 0 35
1422850 Color distortion (purple/green) during video playback on some nvidia devices Core / Audio/Video: Playback enhancement 6 years S3 0 7 11 2 32
1414024 bypassCache propertie should not be ignored for an discarded tab when using tabs.reload WebExtensions / General defect 6 years S3 0 10 7 1 32
1404136 Since landing of 1399498, Windows 7 and Photon result in a very inconsistent mix Firefox / Theme enhancement 6 years S3 4 2 10 2 28
1401122 The favicon of a pinned tab displays glitches when hovered or brought to focus Core / Layout defect 6 years S4 1 2 17 3 29
1400578 Save form data for previous session history entries Firefox / Session Restore enhancement 6 years S3 0 33 7 1 5
1398886 Partial SOP Bypass (All Browsers) Core / DOM: Security defect 6 years S3 0 0 17 3 33
1397996 scrollbar thickness reveals platform Core / DOM: Core & HTML defect 6 years S3 0 2 20 0 36
1387483 [Meta-Bug] Support ReadableStream as Request.body in fetch API Core / DOM: Core & HTML enhancement 6 years S3 1 6 34 2 14
1386673 Make Contextual Identity extensions be an optional permission WebExtensions / General enhancement 6 years S3 3 12 14 0 19
1386206 Breaking FormData's collect loop into chunks to be executed in idle dispatch Firefox / Session Restore enhancement 6 years S3 0 11 6 0 35
1364859 ... Core / DOM: Security defect 6 years S3 0 0 13 3 36
1363383 Channel switching on Slack is slow Core / JavaScript Engine defect 6 years S3 1 4 25 0 26
1348405 Implement Long Animation Frame API Core / DOM: Performance enhancement 6 years N/A 2 3 27 1 21
1348341 Implement OOP JIT Core / JavaScript Engine: JIT enhancement 6 years S3 0 4 38 0 20
1333035 Crash in OOM | large | NS_ABORT_OOM | mozilla::cyclecollector::HoldJSObjectsImpl Core / Cycle Collector defect 7 years S3 3 0 15 3 27
1332301 Enable dom.forms.selectSearch by default Core / Layout: Form Controls enhancement 7 years S3 0 7 32 0 19
1286068 ... Core / Graphics defect 7 years S3 0 0 23 1 33
1282982 Implement chrome.management.setEnabled WebExtensions / General enhancement 7 years S3 0 13 23 2 14
1278554 CanvasRenderingContext2D::DrawImage takes lots of time when scrolling Google Spreadsheet Core / Graphics: Canvas2D defect 7 years S3 0 2 25 2 28
1245502 Would be nice to see the container for each tab in about:sessionrestore Firefox / Session Restore enhancement 8 years -- 0 23 13 0 15
1239859 Make it easier to discover tools in the toolbar tabbar DevTools / Framework defect 8 years S3 0 3 14 6 27
1167872 Error: TypeError: this._recipeManager is null Source file: resource://gre/modules/LoginManagerParent.jsm Line: 118/185 Toolkit / Password Manager defect 8 years S3 5 1 21 0 24
1142123 Unable to remember which camera to ALWAYS share Firefox / Site Permissions defect 8 years S3 6 0 22 3 16
1026009 pdf.js takes 75s to render the last page of this PDF whereas Chrome takes 10s - clip() is slow Core / Graphics: Canvas2D defect 9 years S3 0 3 11 2 37
916419 Expose MathML as a hierarchical accessible tree Core / Disability Access APIs defect 10 years S3 0 2 8 2 39
839446 Implement DOM3 KeyboardEvent types for media Core / DOM: Events defect 11 years S3 2 1 36 0 20
800050 unable to select text in input[type="text"][draggable] Core / DOM: Copy & Paste and Drag & Drop defect 11 years S3 1 5 25 1 23
701246 "Never remember history" activates private browsing mode without telling user Firefox / Settings UI defect 12 years S2 6 1 19 3 17
672085 If window only has one tab, dragging tab to detach should temporarily hide window frame Firefox / Tabbed Browser defect 12 years S3 0 14 20 0 21
651185 double quotes aren't a legal delimiter for 2231/5987 encoding Firefox / File Handling defect 12 years S3 0 1 21 0 35
645563 Implement scrollbars using a single anonymous element, instead of nested XUL NAC Core / Layout defect 12 years S3 0 18 29 0 9
605111 Pinned tabs show "new content" highlights when there is no new content Firefox / Tabbed Browser defect 13 years S3 6 2 20 0 19
587729 Do all minidump generation out of process Toolkit / Crash Reporting defect 13 years S3 0 7 33 2 14
565771 Don't separate windows from tabs in the undo stack Firefox / General defect 13 years S3 0 8 23 1 24
556305 Firefox cpu usage goes to 100% when presented with mismatched html tables Core / Layout: Tables defect 13 years S3 0 2 16 2 33
526293 Firefox file selector should show remote shares Core / Widget: Gtk defect 14 years S3 3 6 12 2 25
511899 disable discarding on a per-image basis when it isn't an obvious win Core / Graphics: ImageLib defect 14 years S3 0 12 27 0 18
496204 Stop using cairo xlib surfaces (at least optionally) Core / Graphics defect 14 years S3 1 3 26 0 26
456620 Allow users to turn off transition effects Firefox / General defect 15 years S3 1 9 20 2 20
428981 When in full screen mode, Alt+letter shortcuts open hidden menus, F11 does not work Firefox / Menus defect 15 years S3 2 10 20 1 19
428892 userchrome.css stylesheet blocked from referencing theme images Core / General defect 15 years S3 1 3 21 0 30
406488 Copy highlighted text to clipboard ignores non-inlined CSS styling when pasting as rich text (to HTML editors, MS Word, Excel, Outlook etc.) Core / DOM: Serializers defect 16 years S3 5 2 19 1 21
336829 NSS does not allow specifying a profile path containing characters outside of the system native codepage NSS / Libraries defect 17 years S3 7 3 15 0 21
324570 Make simultaneous notifications from alerts service work Toolkit / Alerts Service defect 18 years S3 5 3 16 0 25
313519 "Connection Interrupted" error-page should not replace page being rendered Core / DOM: Navigation defect 18 years S3 1 9 20 0 24
293611 'Web page, complete' isn't saved correctly if filename includes non-ASCII characters Firefox / File Handling defect 18 years S3 0 20 8 0 22
286651 Strip privilege from chrome loaded in a browser/content window Core / Security enhancement 18 years S3 1 2 38 0 18
259810 Ctrl+U works in textbox but not in textarea (when "emacs bindings" are enabled) Firefox / Keyboard Navigation defect 19 years S3 2 10 13 0 25
236100 No Full-screen mode on next startup when browser is switched in full-screen mode when exiting Firefox / Session Restore defect 20 years S3 5 7 15 0 19
234243 If MIME type is not recognized by Firefox, the "What should Firefox do..." dialog is unusable Firefox / File Handling defect 20 years S3 5 14 10 0 14
179135 top:auto blocks with position:absolute misplaced when printing Core / Printing: Output defect 21 years S3 2 16 14 2 13
172520 [UX] Text Zoom font size default not remembered after Print Preview Core / Print Preview defect 21 years S3 6 9 13 0 17
143021 Local files w/ relative file URLs need to have a drive letter. Core / Networking: File defect 21 years S3 5 4 12 0 25
109207 the dtd handler take 3% of start up time. Core / XML defect 22 years S3 0 3 21 0 34
95790 Contextual menus of form options won't go away Core / DOM: UI Events & Focus Handling defect 22 years S3 6 6 12 0 20
23858 mouse movement in grippy / splitter screws up click for spring open behavior Core / XUL defect 24 years S3 8 2 8 0 25
1863872 [WebGPU] with no-readback dx12 enabled, crash on https://wgpu-game-of-life.fornwall.net/#rule=1&size=2048&seed=0&density=29&gps=30 Core / Graphics: WebGPU defect 3 months S4 0 0 6 3 40
1859291 Snap package does not support hw decoding of H264 and VP9 on amd gpu due to mesa < 23.1.1 Firefox Build System / Third Party Packaging defect 4 months -- 1 0 5 3 39
1847453 firefox uses too much vram and doesn't release it if i close tabs Core / Graphics defect 6 months S2 0 0 17 3 31
1840617 Updater fails to escalate privileges as needed if the install directory permissions grant the user full control but are not inheritable Toolkit / Application Update defect 8 months S3 0 0 4 2 43
1827268 shallowEqual from React is a lot slower in SM than V8 and JSC Core / JavaScript Engine: JIT enhancement 10 months N/A 1 2 12 2 31
1817856 Firefox suggests opening links in apps when opening a PDF Fenix / Browser Engine defect 1 year, 8 days S3 0 0 15 3 33
1812622 Occasionally semi-freeze/unresponsive on startup Core / Widget: Cocoa defect 1 year, 1 month S3 6 1 13 1 23
1805644 Speedometer 2 is ~5% faster with --disable-jemalloc Core / Performance Engineering task 1 year, 2 months -- 0 1 30 4 19
1790872 Report telemetry about IPC messages sent/received Core / IPC task 1 year, 5 months S3 0 0 9 4 34
1752678 Prompts never disappear (GNOME Wayland) with gfx.webrender.compositor.force-enabled Core / Graphics: WebRender defect 2 years S4 6 3 18 1 15
1737951 Visible delay/lag in fluent translation of context menuitems Firefox / Menus defect 2 years S4 0 0 9 3 36
1730797 Using capped, unpartitioned thread-pools for cross-site and / or cross-profile communication Core / Privacy: Anti-Tracking defect 2 years S3 0 1 24 3 25
1724299 Implement auto-expanding <details> Core / Find Backend enhancement 2 years -- 4 8 20 1 14
1714939 Provide an option to open new normal window when popup is requested by window.open Core / DOM: Core & HTML enhancement 2 years S3 1 1 7 4 33
1708195 parts of the websites and About Firefox dialog will not display correctly (Intel Iris Xe Graphics) Core / Graphics defect 2 years S3 0 0 10 3 37
1646462 Add Firefox ARM64/AArch64 option to Flathub (Flatpak) Release Engineering / Release Automation: Other enhancement 3 years N/A 1 7 36 0 13
1642623 User's search term is accidentally sent to ISP without user's consent. Firefox / Address Bar defect 3 years S3 2 3 27 3 14
1642310 Mac OS: After restart, Firefox windows re-open in the same single virtual desktop instead of the virtual desktops they previously occupied. Firefox / Session Restore defect 3 years -- 0 6 23 4 18
1639584 Color management different with or without embedded color profile Core / Graphics: Color Management defect 3 years S3 1 4 20 1 25
1636094 Zoom.us Audio gets disconnected periodically Core / WebRTC: Audio/Video defect 3 years S3 0 4 21 0 30
1626348 ... Fenix / General defect 3 years S3 4 0 9 7 18
1610526 Different taskbar icons for each opened firefox profile Firefox / Shell Integration enhancement 4 years -- 1 4 22 0 27
1601950 7.07 - 8.42% about_preferences_basic (windows10-64-shippable, windows10-64-shippable-qr) regression on push 2d39de2be1ae9fa8063a19b459d8712fa90bc851 (Wed December 4 2019) Firefox / Settings UI defect 4 years S4 0 1 22 1 31
1585978 Used storage space for saved cookies and site data is abnormal in some circumstances Core / Storage: localStorage & sessionStorage defect 4 years S3 6 0 16 2 19
1568722 Kinetic scrolling on Linux ought to stop on two-finger touch (hold gestures) Core / Widget: Gtk enhancement 4 years S3 2 4 25 0 21
1565261 ff 68 refuses to process a xslt schema for a resource loaded via file:// schema Core / DOM: Security defect 4 years S3 6 1 18 0 21
1562221 ... Firefox / Security enhancement 4 years S3 0 0 17 2 32
1558336 Allowing extension to run in PB via doorhanger closes post-install page and breaks extension Toolkit / Add-ons Manager defect 4 years S2 3 3 13 4 21
1532642 ORB, aka CORB++ (blocking all the "no-cors" cross-origin responses possible) Core / DOM: Networking enhancement 4 years S3 0 3 31 0 22
1530097 [css-grid] Implement the "Increase sizes to accommodate spanning items crossing flexible tracks" step Core / Layout: Grid enhancement 5 years S3 0 2 14 9 19
1515213 Investigation usage of clang -ftrivial-auto-var-init flag Developer Infrastructure / Source Code Analysis task 5 years S3 0 0 23 1 30
1514734 Crash in mozilla::dom::ipc::SharedStringMap::SharedStringMap Core / IPC defect 5 years S3 1 0 16 2 31
1478319 ... Core / DOM: Geolocation defect 5 years S3 2 0 13 2 32
1455894 Need to teach selection about the flattened tree / frame tree instead of the light tree Core / DOM: Core & HTML enhancement 5 years S3 1 5 16 5 18
1448276 WebExtensions with a toolbar icon placed in the overflow menu have visibility and usability issues WebExtensions / General defect 5 years S3 5 6 14 4 11
1446231 Override page CSP for inline script nodes injected by extension content scripts Core / DOM: Security enhancement 5 years S3 1 14 24 1 9
1441563 getUserMedia timeouts causing lots of intermittent failures (mostly on linux, but sometimes on windows) Core / WebRTC: Audio/Video defect 6 years S3 0 1 13 4 30
1439412 Linux: Evaluate only using fontconfig in the parent process Core / Graphics: Text enhancement 6 years S3 0 3 29 1 22
1437937 WebExtensions Doesn't Find Source Maps WebExtensions / Developer Tools defect 6 years S3 1 4 23 2 22
1427104 Allow Firefox to send crash reports to Mozilla option not working Firefox / Settings UI defect 6 years S3 0 1 20 1 33
1425828 Comcast video won't play (mixed OBJECT_SUBREQUESTS are blocked) Core / DOM: Security defect 6 years S3 0 0 13 2 37
1364415 leave location bar suggestions open when I middle click or ctrl click an item Firefox / Address Bar enhancement 6 years S3 0 10 15 3 19
1336199 Allow storing alternate data (ex: JS Bytecode) in the DOM cache Core / Storage: Cache API defect 7 years S3 1 4 18 2 24
1332290 sync may resurrect old deleted items Firefox / Sync defect 7 years S3 3 1 11 2 30
1319262 Mime type text/markdown is downloaded instead of displayed Firefox / File Handling defect 7 years S3 0 6 25 1 22
1308660 for background tabs, break refresh driver tick into multiple events off the main thread's event loop Core / Layout enhancement 7 years -- 0 5 16 2 29
1280819 Disable async stacks by default in more cases Core / JavaScript Engine defect 7 years S3 0 3 20 3 25
1262982 Some favicons are more pixelated in Firefox than in Chrome and Edge on Retina Macs and HiDPI Windows Firefox / Tabbed Browser defect 7 years S4 2 0 16 3 28
1262128 Cross-Protocol Theft from non-HTTP services via DNS rebinding + "HTTP/0.9" Core / Networking defect 7 years S3 0 2 18 5 24
1261339 Implement chrome.pageCapture WebExtensions / General enhancement 7 years S3 1 15 24 0 11
1260254 Lazy load tabs on session restore Firefox / Session Restore defect 7 years S3 0 25 12 0 11
1260225 Move inspector-related command buttons (rulers, measurement) to the Inspector panel and enable them by default DevTools / Inspector defect 7 years S3 0 2 12 2 34
1232491 Expose the displayport to web content Core / Panning and Zooming enhancement 8 years S3 0 4 25 3 21
1230176 Weirdness at end of Fennec fling. Don't send duplicate DOM 'scroll' event for sub-pixel scrolling Core / Panning and Zooming defect 8 years S3 1 1 12 3 30
1223425 port.onDisconnect isn't fired when extension is disabled/uninstalled WebExtensions / General defect 8 years S3 1 6 23 0 22
1217301 Make the UI/UX of the CSS Filter tooltip better DevTools / Inspector enhancement 8 years S3 0 1 9 3 37
1213951 Add "fit" option to ensure entire viewport is visible DevTools / Responsive Design Mode defect 8 years S3 1 8 24 1 17
1205631 HTML Parser ambiguity with inline svg and nested styles Core / DOM: HTML Parser defect 8 years S3 1 2 12 2 32
1102531 On-demand download of Cisco H.264 plugin should occur over HTTPS Core / Audio/Video: GMP defect 9 years S3 0 4 24 0 26
1084626 Remove support for Chrome -> Content leaks through debugger objects Core / JavaScript Engine defect 9 years S3 0 8 24 1 19
1059724 Add notifications for changes in indexedDB db. Core / Storage: IndexedDB enhancement 9 years S3 0 4 24 1 24
1043118 Do not select leading/trailing spaces on double clicking. Core / DOM: Selection defect 9 years S4 0 4 14 6 22
908125 Reject BR EE certificates with lifetimes / validity greater than the BRs allow Core / Security: PSM defect 10 years S3 1 4 20 0 27
731478 Cache the peer's intermediate CA certificates in SSL session ID NSS / Libraries defect 12 years S4 0 0 13 3 33
716279 [UX] style unloaded background tabs differently from loaded background tabs Firefox / Theme defect 12 years S3 3 6 23 0 19
711465 Reconsider DOM session storage behavior Firefox / Session Restore defect 12 years -- 0 9 26 0 19
695995 Normalize filenames in form uploads and the DOM to NFC Core / DOM: Core & HTML defect 12 years S3 1 0 21 1 31
695868 Unable to set document.body.innerHTML of IFrame Core / DOM: Core & HTML defect 12 years S3 0 6 15 4 24
684548 Allow restoring tabs/windows one by one to solve various issues (crash, overload, portal login ...) Firefox / Session Restore enhancement 12 years S3 0 25 13 0 10
653102 Do Not Cache the blacklisting decisions; instead cache the downloaded blacklist entries and reevaluate everytime Core / Graphics defect 12 years S3 7 5 16 0 15
646937 throttle animation in completely obscured windows (virtual desktop, minimised, hidden behind other fullscreened windows) Core / Widget defect 12 years S3 0 5 20 3 23
629606 Apng ram usage doubles upon scrolling Core / Graphics: ImageLib defect 13 years S3 0 3 20 0 31
587438 word-wrap:break-word does not work in tables Core / Layout: Tables defect 13 years S3 1 10 21 0 18
579629 Normal Tabs should morph/animate into App Tabs and vice versa Firefox / Tabbed Browser defect 13 years S3 1 13 28 0 9
570835 Focus should be removed from elements when they are hidden or otherwise unfocusable Core / DOM: Core & HTML defect 13 years S3 4 4 20 1 17
449336 Only play sound from current tab/window for video/audio elements Core / Audio/Video: Playback enhancement 15 years S3 2 9 24 0 17
435380 estimated time and download speed stop reporting when download speed is zero Toolkit / Downloads API defect 15 years S3 5 5 19 0 18
433942 Can't set focus when going "Back" a page after dismissing a notification bar Core / Widget defect 15 years S3 0 8 22 0 24
417770 META REFRESH redirect warning appears immediately instead of when timer fires Core / DOM: Navigation defect 16 years S3 0 11 22 0 21
408991 Find a way to efficiently extract bookmarks paths Toolkit / Places enhancement 16 years -- 0 15 20 1 15
378082 Cannot copy/paste text in Page Info to clipboard Firefox / Page Info Window defect 16 years S3 5 3 16 0 21
348941 Provide Capability to Handle Logins with User ID and Password on Separate Pages Toolkit / Password Manager defect 17 years S3 2 8 18 3 16
331779 Please set intl.locale.requested to "" by default Core / Internationalization enhancement 17 years S3 1 4 20 0 27
325891 DOMContentLoaded event not fired in result document of XSLT transformation Core / XSLT defect 18 years S3 1 13 19 0 18
275193 Clear Search Button Firefox / Search enhancement 19 years N/A 5 5 14 0 22
265868 Page can stomp on PRIMARY clipboard by calling select() at the right time Core / DOM: Selection defect 19 years S3 0 2 26 0 27
248715 Avoid shifting the page when toolbars appear or disappear Firefox / Toolbars and Customization enhancement 19 years S3 2 11 16 1 17
233441 Consider using a bit for IsViewInserted() Core / Web Painting defect 20 years S3 0 9 25 0 19
233262 Mozilla is vulnerable to gzip bombs Core / Security defect 20 years S4 1 3 22 1 24
154199 Combine PresShell and PresContext Core / Layout defect 21 years S3 0 2 30 0 24
72001 [Alt] shortcuts hide menus if menu bar hidden Core / XUL defect 22 years S3 6 2 11 0 23
51848 [AltSS] UI for alternate and user stylesheets for printing Core / CSS Parsing and Computation enhancement 23 years S3 2 9 22 0 16

Sincerely,
BugBot

See the search query on Bugzilla.

See the source / report issues on the GitHub repo