What's new in the WebKitGTK 2.39.1 release?
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  - Use ANGLE for WebGL implementation and enable WebGL2.
  - Remove internal nested wayland compositor making libwpe mandatory when building with wayland enabled.
  - Prefer EGL over X11, intead of GLX, where available.
  - Add support for background-repeat: space.
  - Add API to check if a response policy decision is for the main resource.
  - Fix rendering of checkbox and radio buttons in black backgrounds.
  - Make checkbox, radio and inner spin button scale along by page zoom.
  - Add support for get computed label and get computed role WebDriver commands.
  - Fix several crashes and rendering issues.