Bug 1634190 R[Core:Audio/Video: Playback][MediaControl-Linux] Only enable `GoNext` or `GoPrevious` when their action handlers exist
Bug 1650257 A[Core:DOM: Content Processes]Crash in [@ IPCError-browser | RecvNewWindowGlobal Cannot create for missing BrowsingContext]
Bug 1659013 R[Core:DOM: Content Processes]Crash in [@ mozilla::BrowserTabsRemoteAutostart] when MOZ_FORCE_DISABLE_E10S is set
Bug 1654926 R[Core:DOM: Content Processes]Processes that crash in startup can be added to the Preallocated Process list
Bug 1659028 R[Core:DOM: Core & HTML]Move IsDisabled() from nsGeneralHTMLElement to Element
Bug 1658280 R[Core:DOM: Navigation]nsISHEntry.scrollRestorationIsManual setter for session-history-in-parent
Bug 1656996 R[Core:DOM: Navigation]Ensure cross-process session history navigations update child process side index and length
Bug 1657757 R[Core:DOM: Navigation]nsISHEntry.title setter for session-history-in-parent
Bug 1387355 R[Core:DOM: Networking]EventSource: ignore IDs with U+0000
Bug 1658594 A[Core:DOM: Security]HTTPS-Only: Fix and simplify HTTPS-Only checks in CORS and MixedContent code
Bug 1653457 N[Core:DOM: UI Events & Focus Handling]Fix failing DOM:UI Events & Focus mochitests with cross-origin and Fission enabled
Bug 1657765 R[Core:Disability Access APIs]Implement mac text API in content process
Bug 1659215 R[Core:Disability Access APIs]Expose previously slow text attributes
Bug 1658858 R[Core:Graphics: WebRender]Implement ImageRendering parameter for SwCompositor
Bug 1657498 R[Core:Graphics: WebRender]Show SWGL state in about:support
Bug 1656818 R[Core:Graphics: WebRender]swgl readback is upside down
Bug 1656817 R[Core:Graphics: WebRender]787947-1.html fails with sw-gl
Bug 1655846 R[Core:ImageLib]Hit MOZ_CRASH(assertion failed: `(left == right)` left: `1024`, right: `0`) at <::std::macros::panic macros>:5
Bug 1435826 R[Core:JavaScript Engine]Implement private instance methods and accessors proposal
Bug 1607970 A[Core:JavaScript Engine]Misc fixes for running gdb prettyprinter tests locally
Bug 1659049 R[Core:JavaScript Engine: JIT]Startup crash on arm64 macOS
Bug 1077305 R[Core:JavaScript Engine: JIT]Atomics: Generate better code for accesses to Uint32 arrays
Bug 1658270 R[Core:JavaScript Engine: JIT]Optimise testing functions in Cache and Warp
Bug 1658279 R[Core:JavaScript Engine: JIT]Optimise ArraySlice in CacheIR and Warp
Bug 1658990 R[Core:JavaScript Engine: JIT]Warp: Transpile AddAndStoreFixedSlot and AddAndStoreDynamicSlot
Bug 1659139 R[Core:Javascript: WebAssembly]Update regalloc.rs in Cranelift backend to version 0.0.29
Bug 1657374 R[Core:Javascript: WebAssembly]Flip flags and options to let simd ride the trains, preffed-off on !Nightly
Bug 1597462 R[Core:Layout]Audit nsIDocShellTreeItem usage in mozilla::AccessibleCaretEventHub::Init + mozilla::AccessibleCaretEventHub::Terminate in layout/base/AccessibleCaretEventHub.cpp
Bug 1386418 R[Core:Layout]Removing an element in a callback for said element crashes the tab
Bug 1658919 R[Core:Panning and Zooming](Maybe) disable one-touch-pinch gesture on desktop
Bug 1658927 R[Core:Panning and Zooming]IME popup is incorrectly positioned with desktop APZ zooming
Bug 1619186 R[Core:Panning and Zooming]macOS "Look Up" spawns popup in the wrong place when the page is zoomed in with apz.allow_zooming=true
Bug 1658469 R[Core:Print Preview]Assertion failure: mIsUAWidget, at dom/base/ShadowRoot.cpp:613
Bug 1658173 A[Core:Print Preview]Scale down print preview so that a single page fits vertically *and* horizontally
Bug 1658073 R[Core:Printing: Setup]Add information on whether collation is supported to the nsIPrinter interface
Bug 1659163 R[Core:Printing: Setup]Factor out the "create a promise that resolves when a background task finishes" from AsyncPromiseAttributeGetter.
Bug 1658878 N[Core:Privacy: Anti-Tracking]Isolate BlobURLs per agent-cluster
Bug 1659057 R[Core:Security: Process Sandboxing]AGX: agxs_util.cpp:355:size_t getSystemMemorySize(): !!! Verification failed: status == 0
Bug 1659046 R[Core:Widget: Cocoa]No implementation of SearchFieldCellWithFocusRing on !x86_64
Bug 1659034 R[Core:XPCOM]nsThread should only unregister itself from the profiler if it registered itself
Bug 1647536 A[Core:XPCOM]Support for ref-counted pointers in nsDeque
Bug 1655406 R[DevTools:Console]Empty context menu if enter is pressed to fast on a letter
Bug 1647917 R[Firefox:Address Bar]Announce search mode to screen readers
Bug 1658646 R[Firefox:Address Bar]Consider showing Places results associated with the search mode engine's domain
Bug 1613468 R[Firefox:Disability Access]Remove "Prevent accessibility services from accessing your browser" from Options/Preferences (about:preferences)
Bug 1652296 R[Firefox:Downloads Panel]Links that use download attribute occasionally failing on save to Dropbox sync folder
Bug 1657796 R[Firefox:Downloads Panel]PDFs downloaded with "Open with Nightly" don't respect "Open in system viewer" context menu item
Bug 1656277 R[Firefox:Migration]Make the bookmarks toolbar appear automatically after import from third party browser
Bug 1658829 A[Firefox:Pioneer]Make all about:pioneer content available off-train
Bug 1659149 R[Firefox:Pioneer]about:pioneer doesn't display itself as a secure internal page of Firefox
Bug 1658920 R[Firefox:Search]Stop running search service tests against the legacy search config
Bug 1656997 R[Firefox:Session Restore]When session history runs in the parent process, SessionStore should not modify the session history when doing process switches
Bug 1659154 R[Firefox Build System:General]Bad call to __init__ of Build object in mach ide after bug 985141
Bug 1659113 R[Firefox Build System:General]Bad call to __init__ of Build object in mach test-info after bug 985141
Bug 1656515 R[GeckoView:General]Language on in-product UI and browser.i18n.getUILanguage() are not updating after changing runtime.settings.setLocales
Bug 1648149 N[GeckoView:General]Migrate GeckoViewContentChild.js to actor
Bug 1659212 R[Toolkit:Crash Reporting]Add aarch64 cpu type to crashreporter_osx.mm
Bug 1659186 R[Toolkit:Form Autofill]Limit `cc-form` detected telemetry to only valid cc sections
Bug 1659047 R[Toolkit:General]"Minimum OS version requirement not met!" when starting on macos 11 when building with SDK 11.0
Bug 1650795 A[Toolkit:Notifications and Alerts]Implement TabDialogBox to show dialogs on tab level
Bug 1651958 A[Toolkit:Notifications and Alerts]Show tab chrome prompts in TabDialogBox
Bug 1659077 R[Toolkit:OS.File]UnixFile.{readdir,*stat} is not a function
Bug 1659099 R[Toolkit:Printing]Subsequent setting changes cause print dialog to grow
Bug 1656129 R[Toolkit:Video/Audio Controls]Remove or update probes expiring in Firefox 82: pictureinpicture.*
Bug 1650151 R[Toolkit:about:memory]Improve diffs between Fission and non-Fission reports
###########
Changes to 66 bugs - 55 fixed.
3 bugs are not included due to being restricted