This is a staging environment for whattrainisitnow.com

«  Firefox 152 release uplifts 

Uplifts by Product
84 uplifts

  1. OOM | small (16.08%) Known top crash
  2. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (5.02%) 1969401
  3. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (5.01%) 2016440
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (4.07%) 1472062
  5. EMPTY: no frame data available; EmptyMinidump (3.13%) 1644486
  6. js::gc::HeaderWord::get (2.59%) 1993404
  7. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (2.38%) 1866944
Uplifts and Backouts
Bug Component Summary
2037923 XPCOM Crash in [@ shutdownhang | mozilla::scache::StartupCache::GetBuffer]
2039575 JavaScript Engine: JIT Crash in [@ CanAttachDOMCall] on Raptor Lake CPUs
2046519 UI Tests TestRail add_run now requires the include_all parameter, causing intermittent HTTP 500 ("Undefined array key 'include_all'") when creating test runs
2046567 Experimentation and Telemetry Add X as a new marketing partner in Adjust
2046721 Homepage [Homepage Sports Widget] [phase3] R32 future games displayed on group stage card
2046732 Homepage [Homepage Sports Widget] [phase3] The last cards in the carousel do not have a corresponding focused dot
2046970 Homepage [Homepage Sports Widget] [phase3] Fix null status clock and Halftime status on the Live match cards
2047473 Homepage Sports widget: order the pager chronologically and open on the live (or next upcoming) match
2047850 Widget: Cocoa Printing via system print dialog no longer works on Mac
2047933 Homepage [Homepage Sports Widget] [phase3] Fix the flash in the sports widget when displaying a third place champions card and a finals card in the pager
  1. OOM | small (17.39%) Known top crash
  2. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (5.16%) 1866944
  3. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (3.98%) 1969401
  4. js::gc::HeaderWord::get (3.71%) 1993404
  5. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (3.46%) 1472062
  6. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (3.38%) 2016440
  7. EMPTY: no frame data available; EmptyMinidump (2.07%) 1644486
Uplifts and Backouts
Bug Component Summary
1849039 DOM: Device Interfaces Add DualSense support to Gamepad API
2014771 Onboarding Remove the legacy Juno onboarding AND any remaining unused attributes from the onboarding redesign
2029632 Widget: Gtk [X11] Video Flickering in Full Screen Mode
2031516 Machine Learning: Frontend Integrate disambiguation flow for natural language tab actions
2031517 Machine Learning: Frontend Show post-close message when closing current tab
2035139 Machine Learning: Frontend Typing inside the smart bar during an AI response will no longer show the Go/Ask Dropdown
2035339 Machine Learning: Frontend Implement conversation state and tool action state management
2035893 Machine Learning: Frontend Handle new prompts while disambiguation/confirmation UI is active
2037203 Machine Learning: Frontend Add telemetry for natural language browser actions
2037624 Machine Learning: General Implement NL browser actions tool and integrate with front-end work
2038069 Machine Learning: Frontend Render History Grid in Smart Window Responses
2038071 Machine Learning: Frontend Display Metadata-Based Thumbnails with Fallbacks
2038073 Machine Learning: Frontend Add History Grid Interaction Telemetry
2039867 Bookmarks [Importing bookmarks] "Cancel" button on the "Importing bookmarks" dialog does not abort the process, resulting in bookmarks being imported in the background
2040036 Machine Learning: Frontend Move natural language browser action UI strings into localization resources.
2040769 Machine Learning: Frontend Handle direct tab close action without confirmation card
2040784 Contextual AI ensure S2S CFR is not displayed when AI Controls is not enabled
2041089 Tabs [Tab Groups] Long pressing a group (grid or list) should start a multi-selection
2042361 Toolbar Toolbar elements change their position when turning the device from landscape to portrait mode
2042865 Machine Learning: Frontend Add test coverage for history grid thumbnails
2043502 Graphics: WebRender Broken gradients on GLES since Firefox 150 due to using mediump int
2044098 Machine Learning: Frontend reuse chatbot keyboard shortcut for smart window assistant sidebar
2044288 Site Reports www.kuaishou.com - Missing video thumbnails for some video sections
2044746 CSS Parsing and Computation Hit MOZ_CRASH(assertion `left == right` failed left: 8 right: 0) at servo/components/style/sharing/mod.rs:158
2045094 Tabs [Tab Groups] Tab groups aren't always displayed when first created
2045149 Security: RLBox Hit MOZ_CRASH(RLBox crash: range has overflowed sandbox bounds) at /builds/worker/workspace/obj-build/dist/include/mozilla/rlbox/rlbox_helpers.hpp:28
2046131 Homepage Enable Edge2Edge background by default on Release
2046401 DOM: Web Crypto Performance regression in concurrent SubtleCrypto operations since Firefox 150, suspected NSS 3.122 upgrade
2046797 DOM: Device Interfaces Gamepad API fails to re-detect Xbox 360 after hot plug when a second controller remains connected on Windows
2046945 New Tab Page Widgets doesn't match UI locale after switching language from settings
2047467 Audio/Video: Playback Update vendored mp4parse-rust to b693c7e4a91d
2047507 Contextual AI 15.83 - 5.37% cnn-ampstories FirstVisualChange + 5 more (Android) regression on Mon June 1 2026
2047849 Onboarding Onboarding clean up and refactor
2047930 Onboarding [Onboarding] Update Treatment C variant to the marketing data onboarding card
2047983 Settings UI Update fluent strings for Settings pane headers that use message references
2048297 Homepage Sports widget: from the quarter-finals, show the full remaining bracket in the no-team pager
2048329 Experimentation and Telemetry Microsurvey bottom sheet requires scrolling to reach the Submit button
2048663 Internationalization: Localization test_l10nregistry_observer.js has a perma failure on shippable Android multi-locale builds
2048993 Contextual AI Shake to summarize feature available but not listed in AI controls
2049060 Contextual AI Update shake-to-summarize nimbus features to use the same defaults everwhere
  1. OOM | small (18.15%) Known top crash
  2. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (5.18%) 1866944
  3. js::gc::HeaderWord::get (4.57%) 1993404
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (4.37%) 1969401
  5. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (3.82%) 1472062
  6. AsyncShutdownTimeout | quit-application | newtabTrainhopAddon scheduleUpdateTrainhopAddonState shutting down (3.43%) 2016440
  7. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadManager::SpinEventLoopUntilInternal (2.11%)
Uplifts and Backouts
Bug Component Summary
2049845 New Tab Page Firefox 152.0.2 extreme memory usage and complete freeze on startup (regression from 152.0.1)
  1. OOM | small (19.02%) Known top crash
  2. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (7.58%) 1866944
  3. js::gc::HeaderWord::get (5.71%) 1993404
  4. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (4.20%) 1969401
  5. OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (3.72%) 1472062
  6. AsyncShutdownTimeout | profile-before-change | Sqlite.sys.mjs shutdown blocker (2.49%) 2009476
  7. shutdownhang | mozilla::SpinEventLoopUntil | nsThreadManager::SpinEventLoopUntilInternal (2.04%)
Uplifts and Backouts
Bug Component Summary
2030299 Search If there are duplicate keywords for search engines, the typed keyword and autocompleted keyword selects different engines
2033002 Machine Learning: Frontend Build feedback modal shell and wire to thumbs actions
2034541 Machine Learning: Frontend Send user feedback payload via Glean
2037701 Tabs Nightly: The app automatically returns to the tab select window every time I exit the app.
2038069 Machine Learning: Frontend Render History Grid in Smart Window Responses
2038071 Machine Learning: Frontend Display Metadata-Based Thumbnails with Fallbacks
2038073 Machine Learning: Frontend Add History Grid Interaction Telemetry
2038130 Machine Learning: Frontend The Keep Closed? callout is displayed when closing a Sidebar with a started conversation
2040844 Widget: Cocoa macOS: Restore Edit menu SF Symbol icons and NSSavePanel sheet undo by overriding undo:/redo: on ChildView
2040851 Widget: Cocoa macOS: Don't mirror XUL command disabled state to NSMenuItem for standard Edit menu items routed via the responder chain
2041077 Settings UI manage cookies and site data empty
2042865 Machine Learning: Frontend Add test coverage for history grid thumbnails
2044325 Graphics: WebGPU Crash in [@ wgpu_hal::auxil::dxgi::result::impl$0::into_device_result::closure$0<T>]
2046026 Web Apps Youtube web app shows a white icon on the Taskbar/Panel
2046553 Installer ERR_INSTALL_TIMEOUT isn't mapped to 'install_timeout' telemetry metric in telemetry.nsh
2046696 Toolbar Swiping vertically in search results can open the tabs tray
2047491 Search CTRL+up/down arrow does not re-order the search engines correctly anymore
2047620 Address Bar Update handling of sorting of Semantic Search results so they rarely evict exact-match results from address bar results
2049307 DOM: UI Events & Focus Handling Incorrect tab focus after clicking internal link
2049515 Experimentation and Telemetry Add UTM source detection for Reddit attribution
2049564 Privacy Don't show the trackers pill on home if no trackers are blocked and protections dashboard is not available
2050195 Machine Learning: Frontend Fix glean.error.invalid_value for microsurvey.smart_window.chat metric
2045623 Other …
2045852 Other …
2046814 Other …
2043241 Other …
2045746 Other …
2045765 Other …
2045514 Other …
2049409 Other …
2049840 Other …
2045576 Other …

Not yet shipped

Uplifts and Backouts
Bug Component Summary
2043379 Crash Reporting Make the crash helper fail gracefully if the main process doesn't rendez-vous in due time