What's new in the WebKitGTK 2.39.91 release?
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  - Rename WebKitWebExtension to WebKitWebProcessExtension in GTK4 API.
  - Remove WebKitJavascriptResult in favor of using JSCValue directly in GTK4 API.
  - Add new API to get the request body of WebKitURISchemeRequest.
  - Make it possible to handle WebKitDownload::decide-destination signal asynchronously.
  - Allow WebKitDownload destination to be a path instead of a URI.
  - Make webkit://gpu output exportable as JSON.
  - Improve scrolling performance in accelerated compositing mode.
  - Implement KeyboardEvent.repeat.
  - Fix a crash in MiniBrowser when the favicon is updated.
  - Fix the build in Ubuntu 20.04 and Debian Stable.
  - Fix several crashes and rendering issues.
  - Translation updates: Korean, Polish, Swedish, Korean.