What's new in the WebKitGTK 2.52.3 release?
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  - Add support for the "scrollbar-color" CSS property.
  - Fix some emoji glyphs being rendered as missing glyph boxes.
  - Fix JavaScriptCore crashes on architectures other than x86_64.
  - Fix the build on s390x.
  - Fix several crashes and rendering issues.
  - Translation updates: Serbian.