Bug 1686696 R[Core:Audio/Video]timeupdate event is fired possibly too often
Bug 1690688 R[Core:Audio/Video: Playback]Some YouTube videos hang with SW-WR (when Windows laptop is on battery power)
Bug 1691350 R[Core:Audio/Video: Recording]Perma TEST-UNEXPECTED-TIMEOUT | /mediacapture-record/MediaRecorder-peerconnection-no-sink.https.html | MediaRecorder records from PeerConnection without sinks, {"video":{}} - Test timed out on Android
Bug 1577198 R[Core:Audio/Video: Recording]MediaRecorder generates too many keyframes for a low timeSlice
Bug 1464268 R[Core:Audio/Video: Recording]Media Recorder - RequestData does not provide data each time when ondataavailable is fired
Bug 1666487 R[Core:Audio/Video: Recording]Passing Timeslice interval to MediaRecorder doesn't affect keyframe generation
Bug 1691858 A[Core:CSS Parsing and Computation]Improve how @page rules are implemented
Bug 1690775 A[Core:DOM: Networking]New wpt crashes in /fetch/h1-parsing/lone-cr.window.html
Bug 1687219 R[Core:Graphics]Update a bunch of telemetry expirations.
Bug 1682329 R[Core:Graphics]Crash in [@ mozilla::gfx::CrossProcessPaint::QueueDependencies]
Bug 1692095 R[Core:Graphics: WebRender]Change DirectComposition virtual surface format to DXGI_FORMAT_R8G8B8A8_UNORM
Bug 1686946 R[Core:Graphics: WebRender]Ship Software WebRender to x86 OSX nightly/early beta users
Bug 1689064 R[Core:Graphics: WebRender]Optimized shaders produce completely broken rendering on Huawei MediaPad M2 (Mali-T628)
Bug 1673752 R[Core:Graphics: WebRender]Enable WebRender by default on Nightly on Gnome with proprietary Nvidia driver >= 460.32.03
Bug 1678119 R[Core:Graphics: WebRender]Avoid doing clip/aa work in ALPHA_PASS shaders if we know we don't need it in VS
Bug 1497581 R[Core:Internationalization]Assertion failure: !locale.IsEmpty(), at intl/locale/LocaleService.cpp:565
Bug 1692135 R[Core:Internationalization: Localization]Add szl to allowed accept-languages
Bug 1416149 R[Core:Internationalization: Localization]Switch from test to lint job for checking fluent files
Bug 1684092 R[Core:JavaScript Engine]Replace MOZ_MUST_USE with [[nodiscard]] in js/src/
Bug 1691923 R[Core:JavaScript Engine]Use Python 3 for mach jstests
Bug 1688622 V[Core:JavaScript Engine]Assertion failure: cx->compartment() != untaggedReferent->compartment(), at js/src/debugger/Debugger.cpp:6274
Bug 1638037 R[Core:JavaScript Engine: JIT]Should Atomics.isLockFree(8) return true?
Bug 1691901 R[Core:JavaScript: GC]MOZ_CRASH [@ js::gcstats::Statistics::lookupChildPhase]
Bug 1691703 R[Core:JavaScript: GC]Splay benchmark triggers lots of GC slices during the prepare phase
Bug 1692162 R[Core:JavaScript: Standard Library]Support larger buffers in TypedArray.prototype.subarray
Bug 1688380 R[Core:Javascript: WebAssembly]Implement SIMD i64x2.all_true, i64x2.eq, i64x2.ne
Bug 1692203 R[Core:Layout]Perma Linux non-WebRender TEST-UNEXPECTED-PASS | /css/css-contain/contain-size-select-elem-003.html | Testing http://web-platform.test:8000/css/css-contain/contain-size-select-elem-003.html when Gecko 87 merges to Beta on 2021-02-22
Bug 1682915 V[Core:Layout]Testcase with IntersectionObserver in iframe triggers Assertion failure: IsAncestorFrameCrossDoc(aAncestor.mFrame, aFrame) (Fix the caller), at layout/base/nsLayoutUtils.cpp:2485
Bug 1690615 R[Core:Networking: HTTP]Extract the dns lookup from nsSocketTransport
Bug 1691879 R[Core:Panning and Zooming]fix expiry with minimal display ports
Bug 1689261 R[Core:Performance]Remove or update probes expiring in Firefox 88: TIME_TO_*
Bug 1676409 R[Core:Printing: Output]Crash in [@ mozilla::MozPromise<T>::ThenValueBase::AssertIsDead]
Bug 1690942 R[Core:Security]Crash in [@ nsScriptSecurityManager::CheckLoadURIWithPrincipalFromJS]
Bug 1689796 R[Core:Security: PSM]Slow page loading in Nightly after restart browser.
Bug 1678470 R[Core:Security: PSM]convert the serialization version of TransportSecurityInfo to an integer
Bug 1691957 R[Core:Storage: IndexedDB]Snappy 1.1.8 now requires SNAPPY_IS_BIG_ENDIAN on big endian systems
Bug 1660219 R[Core:Web Audio]Perma [tier2] /webaudio/the-audio-api/the-oscillatornode-interface/osc-basic-waveform.html | X Custom: 100 Hz does not equal [1,1.0141456127166748,1.0280853509902954,1.0418163537979126,1.0553359985351562,1.0686413049697876,1.081729769706726,
Bug 1691936 R[Core:WebRTC]Perma linux wpt [tier 2] /webrtc/RTCPeerConnection-relay-canvas.https.html | Two PeerConnections relaying a canvas source - promise_test: Unhandled rejection with value: object "TypeError: can't access property "getTracks", stream is undefined"
Bug 1692224 R[Core:Widget]Select elements use same foreground/background color in devtools with dark theme and NNT enabled, or on all content with widget.content.allow-gtk-dark-theme=true
Bug 1691171 R[Core:Widget: Cocoa]"warning: 'beginSheet:modalForWindow:modalDelegate:didEndSelector:contextInfo:' is deprecated" in nsCocoaWindow.mm
Bug 1691213 R[Core:Widget: Cocoa]Some cleanup in native menu code, round 1
Bug 1137575 R[Core:Widget: Cocoa]10.10|10.14 bustage in test_native_mouse_mac.xul
Bug 1683578 A[Core:Widget: Gtk][wayland] Tooltips occasionally stop showing
Bug 1642599 R[DevTools:Console]Enable console message listening from the server side for process and worker targets
Bug 1689297 R[DevTools:Console]Add a cloned content message resource
Bug 1681699 A[DevTools:Debugger]Cover testing hitting early breakpoint during a remote iframe load
Bug 1681698 A[DevTools:Debugger]Bootstrap thread actor as soon as we start registering breakpoints via the Watcher actor
Bug 1692097 R[DevTools:Framework]Remove remaining X.setAttribute("hidden", "true") references from devtools/client
Bug 1692271 R[DevTools:Inspector]Enable color scheme simulation on Nightly only
Bug 1665302 R[DevTools:Inspector]Intermittent devtools/client/inspector/boxmodel/test/browser_boxmodel_editablemodel_border.js | Should have the right value in the box model. - Got "3", expected "0"
Bug 1691788 R[DevTools:Inspector: Rules]Unclosed tag in Fluent message inactive-css-not-display-block-on-floated
Bug 1668218 R[DevTools:Performance Tools (Profiler/Timeline)]Enable new Performance panel by default on Nightly
Bug 1685061 R[DevTools:Performance Tools (Profiler/Timeline)]Localization new Performance panel onboarding component
Bug 1691995 A[DevTools:Responsive Design Mode]Add a test for RDM screenshot with iframes
Bug 1608272 R[Firefox:General]Ban the use of passing this as the second argument to ChromeUtils.import
Bug 1685313 A[Firefox:General]Display chrome window modal dialogs from the prompt service inside browser windows
Bug 1692106 R[Firefox:Keyboard Navigation]High Frequency keyboard/browser_toolbarButtonKeyPress.js | A promise chain failed to handle a rejection: can't access property "pktUI", this.browsingContext.topChromeWindow is null - stack: receiveMessage@resource:///actors/AboutPocketParent.jsm:54:9
Bug 1685593 R[Firefox:Messaging System]Update Activity Stream docs to correct npm commands
Bug 1692099 V[Firefox:Nimbus Desktop Client]File path is undefined for ExperimentStore
Bug 1692324 R[Firefox:Pocket]Fix link to signup button for 1 button variant
Bug 1689251 R[Firefox:Preferences]Options New Tabs always says Firefox Home
Bug 1690192 N[Firefox:Tabbed Browser]Intermittent leakcheck | default X bytes leaked (ThreadSafeWeakReference<UnscaledFont>, UnscaledFontMac, gfxFontEntry, nsStringBuffer, nsTArray_base)
Bug 1689852 R[Firefox:Tabbed Browser]Proton tabs display 'Playing' when media is actually blocked
Bug 1688294 R[Firefox:Theme]The highlight on the `<` button overlaps the highlight on the first pinned tab.
Bug 1688072 R[Firefox:Theme]Tweak tab spacings to fit final design
Bug 1691781 R[Firefox:Theme]On some linux gtk themes, tab bar lines are almost invisible
Bug 1687703 R[Firefox:Theme]Add telemetry and a pref to tell if someone has used Ctrl-Tab, so that we can flip the default value of the browser.ctrlTab.recentlyUsedOrder pref to false if they haven't.
Bug 1592050 R[Firefox:about:logins]Firefox Lockwise does not allow users to search via password with Master Password enabled
Bug 1685764 R[Firefox Build System:General]Switch macOS builds to latest 10.12 SDK
Bug 1692126 R[Firefox Build System:Task Configuration]Clean up after bug 1614626
Bug 1692234 R[Firefox Build System:Toolchains]Allow new pass manager with ubsan on clang 10.0.1+
Bug 1692246 R[GeckoView:General]Add debugging tools to GVE for 1687823
Bug 1689234 R[Toolkit:Add-ons Manager]Remove hideView method from aboutaddons.js
Bug 1690791 R[Toolkit:Find Toolbar]Position of scrollbar tick marks becomes incorrect when resize browser size
Bug 1690783 R[Toolkit:Find Toolbar]Number of scrollbar tick marks is incorrect
Bug 1692113 R[Toolkit:General]Review usages of `.getAttribute("hidden")`
Bug 1691313 R[Toolkit:General]Rewrite `X.setAttribute("hidden", Y)` to `X.hidden = Y` in toolkit/
Bug 1671702 R[Toolkit:Printing]Add "Flip on side edge"/"Flip on top edge" options to new print UI (duplex printing)
Bug 1692076 R[Toolkit:Themes]In-content checked/selected checkboxes/radiobuttons are invisible when printing, if Print Backgrounds is disabled
Bug 1588616 R[WebExtensions:General]ext-menus.js doesn't properly call withLastError (null instead of caller)
Bug 1691144 R[WebExtensions:General]windows.onFocusChanged does not fire for private windows when there is no private window permission
Bug 1685570 R[WebExtensions:Request Handling]Addon network request origin header omitted in v85.
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Changes to 85 bugs - 71 fixed.
2 bugs are not included due to being restricted