Bug 1604063 R[Core:CSS Parsing and Computation]Make LengthPercentage not copy.
Bug 1597419 R[Core:DOM: Navigation]Fix uses of nsCopySupport::FireClipboardEvent in dom/base/nsCopySupport.cpp
Bug 1603889 N[Core:DOM: Navigation]Simplify the scrollbar preference setup.
Bug 1603515 R[Core:Graphics]Dotted artifacts appear on many websites on Intel HD 520 with webrender.compositor
Bug 1600124 R[Core:Graphics: Layers]Assertion failure: !aFragment.IsEmpty(), at /builds/worker/workspace/build/src/gfx/ipc/CrossProcessPaint.cpp:238 and crash
Bug 1603676 R[Core:Graphics: WebRender]Move picture caching check for WR compositor to Feature::WEBRENDER_COMPOSITOR check
Bug 1604088 R[Core:Graphics: WebRender]Switch OS compositor off by default on Windows.
Bug 1602407 R[Core:Layout]Add wiki.m.o continuation model link to some in-tree documents
Bug 1598749 R[Core:Layout]Remove w3c-css/received/css-namespaces reftests
Bug 1604011 R[Core:Layout]Dead assignment in StreamLoader::OnStopRequest
Bug 1604009 R[Core:Layout]Dead assignments in nsGridRowGroupLayout::CountRowsColumns and nsGridRowGroupLayout::BuildRows
Bug 1601609 R[Core:Layout: Generated Content, Lists, and Counters]Perma Beta TEST-UNEXPECTED-ERROR | /css/css-lists/animations/list-style-image-interpolation.html | NotSupportedError: Animation to or from an underlying value is not yet supported. when Gecko 73 merges to Beta on 2020-01-06
Bug 1601743 R[Core:Networking]Firefox does not set the value of `document.referrer` to that of the Referer header sent
Bug 1602727 R[DevTools:General]target-mixin destroy can be called several times synchronously
Bug 1599962 R[DevTools:General]Omniscient Browser Toolbox can't open remote <browser> elements when debugging non-browser windows
###########
Changes to 17 bugs - 16 fixed.