What's new in the WebKitGTK 2.53.92 release?
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  - Fix opacity animation not damaging descendant layers.
  - Fix expiration date of favicons in the icon database.
  - Fix webkit_web_view_get_tls_info() that sometimes returned FALSE for valid HTTPS connections.
  - Fix documentation of webkit_web_view_call_async_javascript_function.
  - Use a Chrome user agent for PrimeVideo.
  - Fix the build with USE_SPIEL=ON.
  - Fix several crashes and rendering issues.