Bug 1653561 R[Core:DOM: Navigation]uriModified = mLoadingEntry->GetURIWasModified(); crashes because of null mLoadingEntry
Bug 1655866 R[Core:DOM: Navigation]beforeunload event is not fired in OOP iframes when reloading documents
Bug 1665862 R[Core:DOM: Networking]Crash in [@ xpc::UnprivilegedJunkScope]
Bug 1665751 A[Core:Disability Access APIs]not running textselection/* results in failing tests
Bug 1665761 R[Core:Disability Access APIs]Add images to VoiceOver Rotor
Bug 1661765 R[Core:Disability Access APIs]Add AXSelectedTextMarkerRange setter
Bug 1657505 R[Core:Disability Access APIs]Add AXFrameSearchKey to search class for VO support
Bug 1666246 R[Core:Gecko Profiler]Crash in [@ profiler_register_thread]
Bug 1666293 R[Core:Graphics: Layers]Crashes at gpusGenerateCrashLog.cold.1 or gpusGenerateCrashLog on Apple Intel graphics hardware
Bug 1656987 R[Core:Graphics: Layers]Crash in [@ RtlDeleteCriticalSection | mozilla::layers::ImageContainer::~ImageContainer]
Bug 1665846 R[Core:Graphics: WebRender]Re-push DisplayItem when video overlay is disabled
Bug 1666170 R[Core:Graphics: WebRender]Make clip items available during scene building
Bug 1666272 R[Core:Graphics: WebRender]Use HW ANGLE failure ID when disabling WebRender due to it
Bug 1664719 R[Core:Graphics: WebRender]Optimize handling of shared / compositor clips for picture caching
Bug 1646096 R[Core:Layout: Flexbox]Implement aspect-ratio for flex
Bug 1665332 A[Core:Layout: Scrolling and Overflow]ScrollFrameHelper::mZoomableByAPZ gets cleared when the scroll frame is reconstructed
Bug 1665272 R[Core:Printing: Setup]The new printing preview is very slow to open
Bug 1663992 R[Core:Privacy: Anti-Tracking]Changes in bug 1652244 break Twitter image downloads with Strict TP enabled
Bug 1665991 R[Core:Widget: Cocoa]Stop unnecessarily repainting default buttons and progress bars
Bug 1666310 R[Core:XPCOM]Allow advancing lateWriteChecksStage outside of Nightly
Bug 1663747 N[Core:XPCOM]Fix ClearOnShutdown's sCurrentShutdownPhase and add API to compare against it
Bug 1661881 R[Core:XPCOM]Performance issue on https://palmeral.github.io/interactive-mandelbrot/
Bug 1664493 R[DevTools:Console]Add a test for logging in Responsive Design Mode
Bug 1665293 R[DevTools:Console]Call WebConsoleWrapper methods only once from WebConsoleUI.onResourceAvailable/Updated
Bug 1665709 R[DevTools:Netmonitor]Use a unique resource listener from netmonitor in order to guarantee resource ordering
Bug 1665459 R[Firefox:General]Early skeleton UI resizes sometimes halfway through startup
Bug 727668 A[Firefox:New Tab Page]Show bookmarks from the bookmarks toolbar in the new tab page
Bug 513180 R[Firefox:Search]When browser.search.openintab == true, and you click the search magnifier instead of enter, it does not open in a new tab
Bug 1663837 R[Firefox Build System:Bootstrap Configuration]Arch Linux: handle java8 being non-default
Bug 1665854 R[Firefox Build System:Generated Documentation]Import more contributions docs from MDN
Bug 1666032 R[Firefox Build System:Mach Core]ensure_java() throws error if $JDK/bin/java is not symlinked to $JDK/jre/bin/java
Bug 1663756 R[GeckoView:Tracking Protection]Expose STATE_UNBLOCKED_UNSAFE_CONTENT in GV's content blocking API
Bug 1666379 R[Release Engineering:Release Automation: Other]Support notification emails for other types of job conclusions
Bug 1665150 R[Toolkit:Add-ons Manager]maybeInstallBuiltinAddon should return a promise
Bug 1631202 R[Toolkit:Themes]Replace :-moz-any() with :is() in the codebase
Bug 1620899 R[Toolkit:Video/Audio Controls]Arrow keys don't work in picture-in-picture window after tabbing unless play/pause is pressed
Bug 1617135 R[Toolkit:Video/Audio Controls]If PiP is in focus the keyboard combination CTRL+SHIFT+] doesn't work for closing the frame.
Bug 1666355 R[Toolkit:Video/Audio Controls]Enable keyboard video control shortcuts in the player window by default
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Changes to 39 bugs - 34 fixed.
2 bugs are not included due to being restricted