Changes in 20201213093323

Built from 188d502975aa87caf192363cf0ff1cafcd2a242a

..index..
Bug 1678357 R[Core:Audio/Video: Playback]Ensure media controller would dispatch first `playbackstatechange` right after `activated`
Bug 1681971 R[Core:Audio/Video: Recording]Perma TEST-UNEXPECTED-OK | /mediacapture-record/MediaRecorder-peerconnection-no-sink.https.html | expected TIMEOUT when Gecko 85 merges to Beta on 2020-12-14
Bug 1682006 R[Core:DOM: CSS Object Model]Don't call Truncate() on the return string in GetPropertyValue.
Bug 1679094 R[Core:DOM: Core & HTML]Resolving `dom::Promise` from rust would be cool.
Bug 1681957 R[Core:Fuzzing]Migrate gecko-fuzz-targets away from rkv 0.10
Bug 1675602 R[Core:Javascript: WebAssembly]Use WebAssembly's type system for TypedObject's
Bug 1677353 R[Core:Layout: Images, Video, and HTML Frames]Absolutely positioned with width auto parent div won't follow child image width
Bug 1681753 R[Core:Panning and Zooming]Migrate some APZ tests to async/await style
Bug 1674653 R[DevTools:Netmonitor]Resending requests should work with Fission
Bug 1681642 R[Firefox:File Handling]Show better information when add-ons block downloads (e.g. .txt files from some sites when uMatrix is installed)
Bug 1643018 R[Toolkit:Crash Reporting]JavaScript error: resource:///modules/ContentCrashHandlers.jsm, line 50: TypeError: can't access property "permanentKey", browser is undefined
Bug 1681944 R[Toolkit:Crash Reporting]Switch all instances of crash-stats.mozilla.com to crash-stats.mozilla.org
Bug 1678210 R[Toolkit:Data Sanitization]Remove or update probes expiring in Firefox 86: datasanitization.*
Bug 1674772 R[Toolkit:Printing]Please indicate unit of Margin.
Bug 1679133 R[Toolkit:Printing]The print preview remains open after closing the printing progress prompt during the “Preparing” state and the print progress prompt is no longer displayed for that browser session
Bug 1680877 R[WebExtensions:General][Fission] Content scripts not working in extension popups
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Changes to 16 bugs - 16 fixed.
2 bugs are not included due to being restricted