Changes in 20210619083556

Built from 668013f3e2015d408903d31f55d2ffdd08137bfd

..index..
Bug 1716045 R[Core:CSS Parsing and Computation]Optimize moz_bullet_font_family instantiation
Bug 1716746 R[Core:DOM: Editor]Rename `EditorBase::IsPlaintextEditor()` to `IsInPlaintextMode()`
Bug 1715483 R[Core:DOM: Navigation]Enable BFCache in parent on Android when Fission is enabled
Bug 1715512 R[Core:JavaScript Engine]Move property information from shapes to property maps
Bug 1653024 R[Core:JavaScript: Internationalization API]Ship Intl.DateTimeFormat.prototype.formatRange and .formatRangeToParts to release
Bug 1685075 R[Core:JavaScript: Internationalization API]localeCompare behaves differently in C.utf8 locale
Bug 1715007 R[Core:JavaScript: Internationalization API]Supporting xx-Yyyy-ZZ implies supporting xx-ZZ
Bug 1715722 R[Firefox:Bookmarks & History][Proton] Carets from Bookmarks Panel are not aligned vertically inside button and adjacent ones
Bug 1715504 R[Firefox:Messaging System]Banner variations for Private Browsing mode experiment
Bug 1709445 R[Firefox:Theme]De-duplicate history icons
Bug 1707101 R[Firefox:Theme]De-duplicate Protections Panel icons
Bug 1706206 R[Firefox:Theme]De-duplicate storage icons
Bug 1717248 R[Firefox Build System:Mach Core]Spurious reconfigures in all platforms due to packages.txt
Bug 1706592 R[Toolkit:Notifications and Alerts]Add test for origin displayed in modal prompt dialogs for file:/// URIs
###########
Changes to 14 bugs - 14 fixed.
1 bugs are not included due to being restricted