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Firefox
151
release uplifts
Uplifts by Product
131 uplifts
Firefox for Android
61
Core
38
Firefox
25
Testing
3
Other
2
Firefox Build System
1
GeckoView
1
151.0.1
Desktop
5 bugs uplifted
Show crashes
Hide crashes
Show bug fixes
Hide bug fixes
libfontconfig.so.1
(20.41%)
Top crash
2041887
OOM | small
(7.67%)
Known top crash
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate
(3.09%)
1969401
AsyncShutdownTimeout | IOUtils: waiting for profileBeforeChange IO to complete | JSON store: writing data for 'targeting.snapshot'
(2.46%)
1877111
AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down
(2.39%)
2016440
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC
(2.34%)
1472062
HandleGLibMessage
(2.00%)
2014335
Uplifts and Backouts
Bug
Component
Summary
2017549
General
Enable libz-rs-sys by default on release
2037552
General
Disable remaining tests running on the android P5 devices
2038900
WebRTC: Audio/Video
Perma dom/media/webrtc/tests/crashtests/2038533.html | single tracking bug
2039070
Task Configuration
Emit pernosco pulse events on most state transitions
2040979
DOM: Device Interfaces
Hang when reloading a page with an active WebSerial port open
151.0.2
Desktop
Android
35 bugs uplifted
Show crashes
Hide crashes
Show bug fixes
Hide bug fixes
OOM | small
(13.30%)
Known top crash
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate
(5.35%)
1969401
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC
(4.59%)
1472062
AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down
(3.98%)
2016440
AsyncShutdownTimeout | IOUtils: waiting for profileBeforeChange IO to complete | JSON store: writing data for 'targeting.snapshot'
(2.79%)
1877111
shutdownhang | mozilla::SpinEventLoopUntil | nsThread::WaitForAllAsynchronousShutdowns | nsThreadManager::ShutdownNonMainThreads
(2.31%)
1524247
js::gc::detail::ChunkPtrHasStoreBuffer
(2.03%)
1980548
Uplifts and Backouts
Bug
Component
Summary
2017166
Machine Learning: Frontend
The Ask Sidebar button Open/Closed state is not read out loud by Screen readers
2018177
Machine Learning: Frontend
[a11y] Smart window - Unable to reach the Add tabs or Ask Submit buttons using keyboard navigation after text is added to the Smart bar
2027078
JavaScript Engine
Regression in Firefox 150: localeCompare(..., { numeric: true, sensitivity: 'base' }) now produces different descending order vs Firefox 149 for numeric-like values
2027928
IP Protection
[a11y] Toggle state not conveyed to screen reader users
2028675
Machine Learning: Frontend
[a11y] Combobox functionality not announced to screen reader users
2028677
Machine Learning: Frontend
[a11y] "Memories" dialog, various barriers for screen reader users
2031577
Networking: Cache
Unable to cache additional imap messages once cache2 disk cache is full
2032193
Machine Learning: Frontend
Add “Use Smart Window by default” setting
2033806
Machine Learning: Frontend
The Sidebar Conversation scrolls back to the top when switching tabs
2034260
Machine Learning: General
Enable semantic history search feature gate when smart window is enabled
2036194
Machine Learning: Frontend
[Feedback MVP] Send user feedback data via Glean
2036389
Machine Learning: Frontend
sidebar smartbar @mention becomes malformed when switching tabs
2037056
IP Protection
Extra large VPN Status Checkbox in Overflow Menu
2038262
IP Protection
The VPN Get started button in settings does not work if you have removed the VPN button from the toolbar and restarted Firefox
2038944
Machine Learning: General
SmartWindow request & response ids metrics are not matching
2039097
Machine Learning: Frontend
Add window resizing support for Spotlight chromeless browser
2039203
DOM: UI Events & Focus Handling
[TSF][Sogou] Quickly entering "=" will cause the browser to crash
2039315
Layout
number increase/decrease controls obscure the number when using field-sizing: content;
2039375
Experimentation and Telemetry
Growth events should be sent even if campaign ID is empty
2039387
Networking
[macOS 26.5] Crashes [@ notify_register_check ] on macOS 26.5
2039503
Experimentation and Telemetry
Update the nova_onboarding_marketing_body_5 string to include the "how we use data" link
2039504
Layout: Form Controls
Inserting caret into textbox and selecting text with mouse cursor no longer work for input with ::first-line pseudo-element
2039516
Homepage
Selecting the edge-to-edge from the wallpaper selection tool doesn't apply the wallpaper
2039787
Tabbed Browser: Split View
Split View is closed when using the switch to tab option
2039795
Tabbed Browser: Split View
Split View closes when using the “Move Tab to Split View”
2039970
Experimentation and Telemetry
Upgrade to Adjust SDK to v5.7
2040429
Homepage
Change the kit logo with soccer ball
2040479
General
Support updated Azure A10 WebGL renderer strings on Windows 11 25H2
2040680
Machine Learning: General
Memories generation - handle budget exceeded scenario
2040693
Layout: Scrolling and Overflow
FF 151.0 not correctly rendering GUI webpage for DocfetcherPro, because CSSOM `insertSheet` API throws an exception when our new partial ::-webkit-scrollbar support is present-but-disabled
2040957
IP Protection
Add browser.ipProtection.blockIPProtectionCallouts pref
2041208
Widget: Cocoa
Remove App Group Container entitlements from Release and Beta channels
2041355
Downloads
Downloads Settings for removing downloads is overriden when updating to Fx151
2041720
DOM: Core & HTML
`<select>` dropdown does not open when element is created in a different realm and appended to parent document (Firefox 151.0.1)`
2042035
Layout: Scrolling and Overflow
Perma [mozilla-release] browser/base/content/test/static/browser_parsable_css.js | single tracking bug
151.0.3
Desktop
Android
55 bugs uplifted
Show crashes
Hide crashes
Show bug fixes
Hide bug fixes
OOM | small
(12.29%)
Known top crash
shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout
(6.92%)
1866944
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate
(5.30%)
1969401
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC
(4.52%)
1472062
AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down
(3.34%)
2016440
shutdownhang | mozilla::SpinEventLoopUntil | nsThreadManager::SpinEventLoopUntilInternal
(2.39%)
js::gc::detail::ChunkPtrHasStoreBuffer
(2.38%)
1980548
Uplifts and Backouts
Bug
Component
Summary
2027788
Distributions
Ignore the distribution ini file if its global.id is mozillaonline
2032669
Browser Engine
AiChoiceBanner should use PromoCard component
2032994
Machine Learning: Frontend
Add thumbs up/down feedback actions behind pref
2033595
Homepage
[Homepage Sports Widget] - Create middleware, lifecycle actions and SportsWidgetRepository interface
2033599
Homepage
[Homepage Sports Widget] - Real World Cup API integration
2035450
Distributions
Ignore the distribution ini file if its global.id is mozillaonline via pref
2036193
Machine Learning: Frontend
[Feedback MVP] Add feedback modal for thumbs up/down
2037056
IP Protection
Extra large VPN Status Checkbox in Overflow Menu
2037227
Homepage
Define network data models for the WorldCup matches API + JSON deserialization
2037245
Homepage
"Following [Team]" card UI
2037247
Homepage
Create a SportsCardPager with a 3-dot overflow menu
2037378
Machine Learning: Frontend
The Assistant Sidebar reopens Automatically when switching tabs after closing it from the X Close button
2037413
Homepage
Add the Sports logo to the Homepage
2037466
Homepage
Update the Sports Country Selector
2037816
Homepage
Implement accessibility requirements for all the Sports components
2037817
Homepage
Implement telemetry for all the Sports components
2037818
Homepage
Update the Match Card implementation
2038467
IME
Typing gets repeated when entering text 2 characters after @ in email fields
2039250
Experimentation and Telemetry
[Experiment][Android] The PWA CFR message is triggered in the treatment B branch of the “Remove all CFRs” experiment
2039380
Homepage
App crashes in private tab when sports widget feature is enabled and "new private tab entry" is disabled
2039769
Homepage
[Homepage Sports Widget] - Enable pre-tournament sports widget pager with cached schedule fetch and Nimbus rollout
2039924
Bookmarks
Remembered flows in BookmarksScreen remain stale even after rotation
2040294
Distributions
Activate the ignoring of the mozillaOnline distribution
2040403
Homepage
Implement error state for live matches
2040407
Homepage
The first match is not displayed in an enlarged (focused) state for teams other than MEX and RSA on the Sports Widget
2040509
Machine Learning: Frontend
Add Nimbus/configuration support for Smart Window default experiment
2040620
Homepage
Implement third place, Champion cards and nullable teams
2040711
Homepage
[Homepage Sports Widget] - Surface tournament-winner and third-place outcomes on sports widget FINAL and THIRD_PLACE_PLAYOFF cards
2040718
IP Protection
Update language referencing number of locations in ipProtection.ftl
2040721
Machine Learning: Frontend
Integrate round 1 feedback UI with Glean submission flow
2040825
Homepage
Show generic experience for eliminated teams and pass eliminated teams to SportsWidgetState
2041156
Homepage
Show full schedule one date per card for no team selected
2041235
DOM: Core & HTML
invalid paste behavior with inputs in table > td
2041471
General
Route win64-aarch64 generate-profile task to 25H2 builder
2041488
Homepage
Update the stage parameters returned from the API
2041497
Messaging System
write_in_microsurvey ping instructions are being forwarded in a clunky way
2041531
Homepage
Display correct sports card header
2041537
Homepage
Always enlarge the first matches (or all live matches) in a pager match card
2041541
Homepage
Don't show group in related matches UI when past group stages
2041544
Homepage
[Homepage Sports Widget] - Add mock server integration in debug tool
2041655
Homepage
[Homepage Sports Widget] [phase2] The widget 3 dot menu has "Change team" item while no team is selected
2041688
Homepage
[Homepage Sports Widget] [phase2] The Firefox logo does not change back to standard after the feature is turned OFF
2041691
Homepage
[Homepage Sports Widget] [phase2] "country_selector_displayed" event not generated when the bottom sheet is opened from Firefox soccer logo
2041705
Homepage
[Homepage Sports Widget] [phase2] No internet connection error is displayed if no team has been selected
2041811
Homepage
Homepage sports debug tool improvement - add an apply button to session
2041887
Graphics: Text
Crash in [@ libfontconfig.so.1] after users upgraded to fontconfig 2.18.0
2042018
Downloads
Crash in [@ java.lang.IllegalStateException: at androidx.fragment.app.Fragment.requireContext(Fragment.java)]
2042497
Machine Learning: Frontend
Remove userFeedbackCollection pref gating for Smart Window feedback UI
2043299
Homepage
Suppress sports-widget error UI during one-week-to-kickoff phase when a cached schedule is available
2043514
Homepage
Update Sports Pager telemetry with source and type extras
2043585
Homepage
Accept nullable teams from the API
2043663
Homepage
Update Champions cads implementation
2043750
Homepage
Sports widget: Champion card missing when Final/Third-Place is decided in extra time
2038537
Other
…
2040903
Other
…
151.0.4
Desktop
Android
36 bugs uplifted
Show crashes
Hide crashes
Show bug fixes
Hide bug fixes
shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout
(27.32%)
Top crash
1866944
OOM | small
(6.77%)
Known top crash
AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down
(5.58%)
2016440
AsyncShutdownTimeout | profile-before-change | Sqlite.sys.mjs shutdown blocker
(4.04%)
2009476
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate
(3.33%)
1969401
shutdownhang | kernelbase.dll | <T>
(3.33%)
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC
(2.97%)
1472062
Uplifts and Backouts
Bug
Component
Summary
2042115
Experimentation and Telemetry
[Experiment][Android] The AI Controls settings page does not open, and a browser crash notification is received after tapping the AI Controls notification
2042532
Messaging System
Expose the count of open tabs as a global targeting attribute
2043249
Graphics: WebRender
Fallback to software WebRender since Firefox 151
2043307
Disability Access APIs
Crash in [@ __delayLoadHelper2 | _tailMerge_uiautomationcore.dll | mozilla::a11y::uiaRawElmProvider::RaiseUiaNotificationEvent]
2044130
IP Protection
Remove mentions of 50 GB bandwidth limit
2044131
IP Protection
Add browser.ipProtection.bandwidth.enabled prefs to allowed prefs for feature callout CTA
2036107
Experimentation and Telemetry
Update Aura Adjust settings
2039424
Experimentation and Telemetry
Add new marketing partner Adjust settings
2039829
IP Protection
IP-PRotection activator add-on: add VPN state and region conditions
2039866
DOM: Navigation
UI hang on Windows when using back/forward buttons
2040888
IP Protection
IP-Protection activator: introduce the WC tab breakage list
2041329
IP Protection
IP-PRotection activator add-on: implement a date condition for the WC project
2042079
IP Protection
IP-Protection activator: set the correct dates for WC
2042286
IP Protection
Addon message incorrectly displayed on unauthorized URL paths for domain-restricted rules
2042289
IP Protection
Messaging addon (infobar) is not displayed on magenta.tv when VPN is enabled during the World Cup time range
2042913
Installer
Investigate the increase of removed Desktop Launchers in the metrics since Fx151
2043067
Toolbar
Site navigation bar is floating when using expanded toolbar
2043569
DOM: Core & HTML
Paste context menu missing in Squarespace editing interface
2043711
Experimentation and Telemetry
Preserve install referrer values containing '=' characters
2043744
Experimentation and Telemetry
Inject CoroutineScope into InstallReferrerHandlingService for deterministic tests
2043749
Experimentation and Telemetry
Limit default Adjust third-party sharing to Google
2043755
IP Protection
Check usage on IPP panel open when paused
2043999
IP Protection
ipp-protection: add telemetry for the ipp-activator messaging
2044051
Layout: Form Controls
Input field with resize: vertical should not be resizable
2044091
Homepage
Sports widget: reorder pager cards to lead with celebrations and bracket finishers
2044150
Experimentation and Telemetry
Add Reddit as new marketing partner in Adjust
2044432
IP Protection
Add a Nimbus variable to set the IPP upgradeNotAvailable pref
2044439
Homepage
Sports widget: throttle World Cup matches API and add Nimbus-controlled interval with mock-server bypass
2044622
Homepage
[Homepage Sports Widget] [phase3] Penalty scores missing from live and ended matches
2044649
Homepage
Sports widget: upcoming Final and Third Place shown first in pager during group stage
2044713
Homepage
[Homepage Sports Widget] [phase3] Phase 3 card is being displayed even though there are still 3 hours left on countdown
2044955
Experimentation and Telemetry
Onboarding marketing card experiment: Treatment C primary button copy update to "Allow and Continue”
2044970
Homepage
[Homepage Sports Widget] [phase2] Automatically close the Country selector when a team has been selected or deselected
2044974
Homepage
[Homepage Sports Widget] [phase3] [Localization] Portuguese "Full time" translation causes severe text crowding and squishes the team flag icon in the sub-matches list
2044981
Homepage
[Homepage Sports Widget] [phase3] Fix Standalone error card background color
2045659
Homepage
[Homepage Sports Widget] [phase3] Move australia from Asia to Oceania
Not yet shipped
Upcoming 151.0.5
No uplifts
(not yet shipped)
Uplifts and Backouts
Bug
Component
Summary