What's new in the WebKitGTK 2.39.2 release?
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  - Add API to support asynchronously returning values from user script messages.
  - Deprecate WebKitConsoleMessage API.
  - Deprecate event parameter of WebKitWebView::context-menu and WebKitWebView::show-option-menu signals
    in favor of a getter in WebKitConextMenu and WebKitOptionMenu.
  - Do not emit context-menu signals for media settings popup menu.
  - Use async scrolling also for keyboard scrolling.
  - Add support for client side certificates on WebSocket connections.
  - Fix first party for cookies set on every media request.
  - Fix a crash on authentication dialog with GTK4.
  - Fix web process leak when webkit_download_set_destination is called with empty destination.
  - Fix several warnings when building for ARMv7 (32-bits).
  - Fix several crashes and rendering issues.