Changes in 20191228094408

Built from 9d135cd098b700c8f0fd28b8fd374aedda89445f

..index..
Bug 1585231 N[Core:Audio/Video: Playback]Intermittent toolkit/content/tests/browser/browser_delay_autoplay_media_pausedAfterPlay.js | Test timed out -
Bug 1605471 R[Core:Audio/Video: cubeb]Update cubeb-coreaudio to acb90e9
Bug 1605822 R[Core:Canvas: WebGL]Run WebGL mochitests on all desktop platforms
Bug 1601703 R[Core:Canvas: WebGL]Crash in [@ gl::Program::getInfoLogLength]
Bug 1599944 R[Core:DOM: Editor]ubuntu1804 - editor/libeditor/tests/test_bug681229.html | Timed out while polling clipboard for pasted data, got: a
Bug 1599947 R[Core:DOM: Editor]ubuntu1804 - editor/libeditor/tests/test_password_per_word_operation.html | Double clicking on the anonymous div element in a password field should select the last word - got +0, expected 7
Bug 1605918 R[Core:DOM: UI Events & Focus Handling]Get rid of `synthesizeDragStart()` in EventUtils.js
Bug 1596126 R[Core:Graphics: WebGPU]Automate synchronization of wgpu code to github
Bug 1605489 R[Core:Internationalization]Errors when enabling spellcheck in a text box
Bug 1606192 R[Core:Layout]Remove some unused nsresult return value in layout code
Bug 1604335 R[Core:Memory Allocator]Temporarily enable PHC on beta
Bug 1585582 R[Core:Networking: HTTP]6.05 - 10.6% raptor-tp6-tumblr-firefox loadtime regression on push d52a0108ed8ef2593db6fe0dafedbc2790941fd0 (Mon September 30 2019)
Bug 1594497 R[Core:Privacy: Anti-Tracking]Increase shavar chunk size limit
Bug 1600191 R[Core:XUL]ubuntu1804 - layout/xul/test/test_bug159346.xhtml | scrollbar didn't change curpos by mousedown #1
Bug 1605027 R[DevTools:Framework]JsWindowActor based Frame target uses the wrong docShell for frames
Bug 1596686 R[DevTools:General]Using absolute paths in require calls
Bug 1606082 R[DevTools:Performance Tools (Profiler/Timeline)]Perma devtools/client/performance-new/test/browser/browser_aboutprofiling-features.js | Uncaught exception - [Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) when Gecko 73 merges to Beta on 2020-01-06
Bug 1604216 R[DevTools:Responsive Design Mode]Perma - devtools/client/responsive/test/browser/browser_orientationchange_event.js | Got an error with usingBrowserUI false: [Exception... "(null)" nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)" when Gecko 73 merges to Beta on 2020-01-06
Bug 1605875 R[Firefox Build System:General]add lucetc/wasi-sysroot toolchains to more linux64 builds
Bug 1597834 R[Firefox Build System:General]Make EARLY_BETA_OR_EARLIER available to python configure
Bug 1605742 R[Firefox Build System:Generated Documentation]Instructions on how to build and contribute to Firefox should move here from MDN
Bug 1606106 R[Firefox Build System:Generated Documentation]Doc: Increase the size of the display
Bug 1602863 N[Firefox Build System:Task Configuration]ubuntu1804 - migrate tasks, tests and other jobs that use desktop1604-test to use ubuntu1804-test image
Bug 1605275 N[Release Engineering:General]Add a tool to make testing scriptworker changes against mozilla-central easier.
Bug 1601037 R[Remote Protocol:Agent]Make options parameter default to {}
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Changes to 25 bugs - 21 fixed.
1 bugs are not included due to being restricted