Changes in 20200113093823

Built from 7295ca89e880c1c930643e72ff0600cb71cebb9e

..index..
Bug 1582132 R[Core:DOM: Content Processes]Remove addons.cdn.mozilla.net from the list of separatedMozillaDomains
Bug 1588791 N[Core:DOM: Content Processes]Fission iframes don't handle the scrolling="" attribute at all.
Bug 1596360 R[Core:DOM: Security]Monitor innerHTML calls in chrome code and on about: pages and assert we can not introduce new calls to innerHTML
Bug 1597916 R[Core:Disability Access APIs]Removing a pseudo-element doesn't fire a textRemoved event
Bug 1608280 R[Core:Graphics: WebRender]Support a per-tile clip (valid) region for compositor tiles
Bug 1608629 R[Core:JavaScript Engine]Split up builtin/Promise.*
Bug 1606084 N[Core:JavaScript Engine]ValueToSource should be useful without toSource methods
Bug 1607987 R[Core:Networking]Split DocumentChannelChild into two classes
Bug 1608601 R[Firefox:Address Bar][Nudges] Urlbar input isn't cleared after clicking the redirect tip's "Okay, Got It" button
Bug 1606894 R[Firefox Build System:Bootstrap Configuration]Document the bootstrap.py script in the tutorial
Bug 1608201 R[Firefox Build System:Generated Documentation]Links broken in contributing docs
Bug 1605742 R[Firefox Build System:Generated Documentation]Instructions on how to build and contribute to Firefox should move here from MDN
Bug 1608679 R[Firefox Build System:Generated Documentation]Docs for managing docs are disappeared
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Changes to 13 bugs - 10 fixed.