Betas this cycle

Uplifts by Product 138 uplifts	Firefox 46 Core 33 Firefox for Android 19 Other 11 Toolkit 8 DevTools 4 Remote Protocol 3 Web Compatibility 2 GeckoView 2 Release Engineering 2 Testing 2 Thunderbird 1 Developer Infrastructure 1 External Software Affecting Firefox 1 Application Services 1 WebExtensions 1 Focus 1

OOM | small (11.11%) Known top crash
AsyncShutdownTimeout | IOUtils: waiting for profileBeforeChange IO to complete | JSON store: writing data for 'targeting.snapshot' (4.76%) 1877111
AsyncShutdownTimeout | profile-before-change | Remote Settings profile-before-change (4.76%) 1605973
AsyncShutdownTimeout | profile-before-change | Sqlite.sys.mjs shutdown blocker (4.76%)
js::ObjectSlots::isSharedEmptySlots (4.76%) 1842861
prefs_parser::Parser::match_char (4.76%)
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::Nursery::maybeMoveRawBufferOnPromotion (3.17%) 1472062

Uplifts and Backouts
Bug	Component	Summary
1968613	Release Automation	partial updates in taskgraph shouldn't be routed through the environment
1973617	Release Automation	update verify config creator broken by python-hglib upgrade

Uplifts and Backouts
Bug	Component	Summary
1972421	New Tab Page	Add OMC Highlight to Follow Button in Sections Layout
1972971	General	Possible regression in `browserSettings.useDocumentFonts` API in recent browser versions
1973631	Networking	Proxied requests treated as local, breaking sites
1973777	Theme	Photon Colors theme light sidebar has become dark with low contrast black text

Uplifts and Backouts
Bug	Component	Summary
1955007	Agent	Remove temporary "remote.system-access-check.enabled" preference in Firefox 141
1959123	Raptor	Outdated dependencies in browsertime
1962816	Printing: Output	Print output layout is broken, when printing "writing-mode: vertical-rl" content to an actual printer (i.e. not the built-in Save-to-PDF print target)
1968586	Crash Reporting	Crash reporter fails to build with --disable-backgroundtasks
1972567	Messaging System	Add infobar support for fluent strings containing the terms of use FAQ and/or privacy notice links
1972766	Machine Learning	Switch onnx native to default
1972769	Machine Learning	Enable smart tab on onnx native
1972973	Machine Learning	building with `--with-onnx-runtime` fails on macOS
1973068	Tabbed Browser	pinned_tabs.pin glean event wrongly attributes gBrowser.pinTab calls to the context menu by default
1973524	General	Crash in [@ java.lang.IllegalStateException: at androidx.navigation.internal.NavControllerImpl.popEntryFromBackStack$navigation_runtime_release(NavControllerImpl.kt:185)]
1973752	Downloads	[Downloads v2] Crash in [@ java.lang.ArithmeticException: at mozilla.components.feature.downloads.DownloadNotification.createOngoingDownloadNotification(DownloadNotification.kt:163)]
1973777	Theme	Photon Colors theme light sidebar has become dark with low contrast black text
1973779	Nimbus Desktop Client	Enable the shared SQL database in Nightly
1974007	Nimbus Desktop Client	Nimbus can fail to flush during shutdown
1974036	Startup and Profile System	Add a barrier for ProfilesDatastoreService to block connection closing
1974259	Crash Reporting	Crash in [@ CancelIoEx]

Uplifts and Backouts
Bug	Component	Summary
1972567	Messaging System	Add infobar support for fluent strings containing the terms of use FAQ and/or privacy notice links
1972931	New Tab Page	Register telemetry events FEATURE_HIGHLIGHT_* events in Glean
1973335	Tabbed Browser	Can't reorder pinned tabs anymore
1973595	New Tab Page	Allow TrendingSearches placement in sections layout
1973797	Enterprise Policies	Bring back some pocket policies
1973849	Address Bar	Semantic database may misassign rowids
1974076	Messaging System	Remove finish setup button and automatically opened message
1974169	Machine Learning	deactivate local cache for all backends in onnx
1974221	Messaging System	Ensure universal infobars persist until dismissed or interacted with, even if the window with the original instance is closed
1974290	Privacy	PBM lock feature can't use experiment
1973333	Other	…
1971581	Other	…
1970422	Other	…

Uplifts and Backouts
Bug	Component	Summary
1922777	Sidebar	Sidebar would not remember last used panel
1929028	App Links	website loads in background while ask to open in app prompt is open
1969290	Machine Learning	show green dot on chatbot icon or sidebar toggle to introduce summarize
1970081	JavaScript Engine: JIT	[loong64] out-of-line definition of 'startWasm'
1970975	Machine Learning	complete onboarding by running the originally triggered prompt, e.g., summarize page
1971157	PDF Viewer	Menu Redesign: Sharing a local PDF from the Menu share button should share a file instead of the `content://...` URL
1971539	Audio/Video: Playback	Crash in [@ nsTArray_Impl<T>::ElementAt \| nsTArray_Impl<T>::operator[] \| mozilla::ThreadSharedFloatArrayBufferList::GetData]
1971941	Startup and Profile System	[Ubuntu] Horizontal line displayed above Navigation Bar when Vertical tabs are ON
1972100	Site Reports	Cannot download translated PDF files from Google Translate
1972841	New Tab Page	Weather background is transparent when a custom wallpaper is applied
1973440	Site Reports	app.diagrams.net - "Appearance" option is grayed/not active in the "Extras" menu
1973485	Sidebar	Expand sidebar on hover UI breaks when multiple open tabs are dragged over the pinned area
1973721	UI Widgets	about:addons search textbox has shrunk and is now clipping the contents resulting in "mozilla.or" despite there being sufficient space
1973740	Menus	Enter Full Screen and Exit Full Screen in MacOS menu do nothing
1973817	Theme	Theme dialogues changed from light to dark in FF 140
1973819	Relevancy	Ensure the interest url data is downloaded for classification
1973916	New Tab Page	The "Trending Searches" feature cannot be enabled via Nimbus
1974034	Layout: Text and Fonts	Noto fonts should NOT be used as default CJK font on Windows
1974182	Machine Learning	add special message action for summarizing current page
1974232	Debugger	Typing in Conditional panel doesn't scroll caret/cursor into view when the value makes the input overflows
1974308	New Tab Page	Add publisher favicon pref to FeatureManifest
1974352	DOM: Core & HTML	crash at null in [@ nsObjectLoadingContent::LoadObject]
1974904	Audio/Video	Fails to propogate hardware/software decoding support properly on Windows
1975027	Security: PSM	Upgrade Firefox 141 to NSS 3.113.1

Uplifts and Backouts
Bug	Component	Summary
1947159	Graphics: WebGPU	majority of our WebGPU examples error with: GPUQueue.copyExternalImageToTexture: Cannot get origin from source
1970661	Accounts and Sync	Add fx-accounts ping
1970732	Toolbar	[Menu redesign 2025] Update icons for sign-in authentication failure and extension disabled to show a red triangle with an exclamation mark inside.
1970973	Audio/Video: Playback	[wmfme] AVC error 0x8004DA73 (DRM_E_H264_SH_PPS_NOT_FOUND)
1971239	Toolbar	[Menu redesign 2025] Enable by default in nightly and beta
1971701	JavaScript Engine	Remove JS::ExposeScriptToDebugger
1971702	Migration	Opera browser is not listed when importing data
1972392	New Tab Page	[HNT-736] newtab shortcuts, thompson sampling
1972409	Messaging System	Make activeNotification targeting aware of chrome Feature Callout
1972486	Graphics: WebGPU	WebGPU: release on stable on Windows 🎉
1972554	Toolbar	[Menu redesign 2025] 'Bookmarks' button title is split on 2 rows
1972567	Messaging System	Add infobar support for fluent strings containing the terms of use FAQ and/or privacy notice links
1972900	New Tab Page	Newtab smart shortcuts feed integration
1972921	Graphics: WebGPU	WebGPU does not display textures rendered by a compute pass
1973149	General	Browser form validation tooltip message does not update if the error state changes on the same element (without the popup having been hidden in the interim)
1973222	Sync	High frequency services/sync/tests/unit/test_telemetry.js \| single tracking bug
1973246	Debugger	When i use debugger for Vuejs 3 application, debugger always crash
1973947	Other	Crash in [@ ff64.dll \| SetThreadInformation]
1974095	Telemetry	test_ThirdPartyModulesPing.js perma-orange on (Windows) artifact builds
1974185	Machine Learning	add chatbot summarize initial events and metrics
1974264	Try	--preset=webextensions no longer schedules Linux or Windows jobs
1974397	Machine Learning	onnx-runtime libs are not packaged by the installer
1974490	Nimbus Desktop Client	Disable enrollment status metric
1974576	Inspector: Rules	Middle click CSS data:image url in devtools creates space but does not create tab
1974685	Inspector	Hitting ESC in markup view search input closes the autocomplete popup AND clears the input
1974713	Theme	Revamped sidebars are no longer using sidebar_text color
1974762	New Tab Page	All inferred interests in OHTTP merino request should be randomized
1974799	Machine Learning	The Ask AI chatbot option remains available after the user removes the AI chatbot from the Sidebar panel
1974947	Machine Learning	Do not embed manifest file when building onnx runtime
1974977	Themes	allow badging non-native menu items with "New"
1975262	Machine Learning	remove hugging chat from chatbot
1975426	Sidebar	Back out drag-to-pin functionality in 141 beta
1973990	Other	…

Uplifts and Backouts
Bug	Component	Summary
1973324	Homepage	Switched to home when reopening through launcher
1973668	General	[WebCompat Reporter] "Your report was sent CLOSE" snack-bar is displayed when opening a page in a new tab
1974029	Networking	Third-Party Libraries' Same-Origin XHR Requests Fail with NS_ERROR_LOCAL_NETWORK_ACCESS_DENIED on Locally Hosted Pages Containing Public Cross-Origin iframe [ETP Strict]
1974220	Machine Learning	Switch pdf.js to onnx-native
1974490	Nimbus Desktop Client	Disable enrollment status metric
1974573	Theme	Low contrast sidebar text for themes with new tab page color scheme that contradicts rest of theme (stop setting browser color-scheme from contentTheme.js)
1974763	New Tab Page	Coarse inferred interests is not sent in telemetry when model is CTR mode
1974901	Widget: Win32	Crash in [@ mozilla::DefaultDelete<T>::operator()] via ObtainAndCacheFaviconAsync

OOM | small (12.26%) Known top crash
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (12.19%) Top crash 1472062
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (3.13%) 1969401
AsyncShutdownTimeout | profile-before-change | Sqlite.sys.mjs shutdown blocker (2.86%)
js::gc::detail::ChunkPtrHasStoreBuffer (2.72%) 1974171
shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (1.98%) 1895110
js::gc::HeaderWord::get (1.77%) 1948635

Uplifts and Backouts
Bug	Component	Summary
1813413	Tabs	Make pressing the back button not close the current tab when there's no history
1966873	Experimentation and Telemetry	Add state, actions and middleware for showing review prompt to the AppStore
1966883	Experimentation and Telemetry	Show custom review prompt when telemetry enabled
1971488	WebDriver BiDi	"storage.getCookies" can return cookies with "sameSite=none" and "secure=false" on HTTP pages, but this is invalid for "storage.setCookies"
1972585	Sync	Sometimes the "tabs" engine reports no `took` value on windows-opt verify runs of test_telemetry.js and test_glean.js
1973093	Application Update	Perma Windows MinGW ld.lld: error: <root>: undefined symbol: GetInstallationDirLayoutType
1973546	New Tab Page	Await the ASRouter trigger when handling AboutNewTabVisible to prevent collisions
1974965	Experimentation and Telemetry	Add CustomReviewPromptTelemetryMiddleware
1975140	Marionette Client and Harness	Reset scroll position before each test in test_click_scrolling.py
1975202	New Tab Page	The "Customize" button is not floating in view and it's displayed at the bottom of the new tab page on smaller screens or if the browser is vertically resized
1975278	Messaging System	Buttons on "universal" InfoBars flicker from enabled--> disabled --> enabled on various user actions (for probably-unnecessary clickjacking protection)
1976223	Toolbar	[Menu redesign 2025] Enable by default in nightly and beta - Not fixed
1976242	Nimbus Desktop Client	Unenrolling and re-enrolling quickly will fail to serialize to the database correctly.
1976289	about:logins	Newtab customize button transparency issues with wallpaper applied.
1968414	Other	…
1973772	Other	…
1975961	Other	…
1974407	Other	…

OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::AutoEnterOOMUnsafeRegion::crash | js::gc::AllocateTenuredCellInGC (10.17%) Top crash 1472062
OOM | small (8.85%) Known top crash
js::gc::detail::ChunkPtrHasStoreBuffer (4.90%) 1974171
AsyncShutdownTimeout | profile-before-change | Sqlite.sys.mjs shutdown blocker (3.20%)
OOM | unknown | js::AutoEnterOOMUnsafeRegion::crash_impl | js::gc::FreeSpan::allocate (3.20%) 1969401
js::gc::HeaderWord::get (2.64%) 1948635
shutdownhang | mozilla::SpinEventLoopUntil | nsThreadPool::ShutdownWithTimeout (1.88%) 1895110

Uplifts and Backouts
Bug	Component	Summary
1958738	General	Google Maps is retaining data between sessions
1959229	Search	Add Aura search codes
1970158	Toolbar	[Menu redesign 2025] Implement telemetry for all the menu items
1970400	Toolbar	[Menu redesign 2025] Implement accessibility for all the menu items
1972314	Enterprise Policies	Check for enterprise installed extension doesn't include the Extensions policy
1972830	Marionette	Perma /infrastructure/testdriver/get_all_cookies.sub.https.html \| Get all HTTPS cookies - assert_equals: expected 9 but got 8 - when Gecko 141 merges to beta on 2025-06-23
1973532	Toolbar	[Menu redesign 2025] Make banner configurable through nimbus
1973975	Graphics: WebGPU	Intermittent application crashed [@ __pthread_kill_implementation] \| single tracking bug
1975349	General	Disable Sync again on Daily
1975520	Messaging System	Universal Infobars unexpectedly show up in pop-up windows (e.g. from extensions like Bitwarden)
1976264	General	Tapping notification without a running GeckoThread causes crash
1976297	Widget: Gtk	GTK file picker dialog buttons don't follow Firefox nor system locale - buttons in english
1976650	Security: PSM	"View…" button on certificate exception dialog does nothing
1968423	Other	…
1975998	Other	…
1972631	Other	…

Uplifts and Backouts
Bug	Component	Summary
1967464	Sidebar	Mute/unmute button on tabs unaligned vertical sidebar
1974770	Privacy: Anti-Tracking	Crash in [@ mozilla::StoragePrincipalHelper::PartitionKeyForExpandedPrincipal]
1975935	Theme	Titlebar buttons on windows don't have proper hover effects with some themes.
1976313	Graphics: WebRender	MFCDM DRM playback shows only black frames on Canal+