What's new in the WebKitGTK 2.27.3 release?
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  - Add support for Pointer Lock API.
  - Improve performance when falling back to system fonts.
  - Stop using DBus for the remote inspector implementation to improve the performance of both
    WebDriver and remote inspector.
  - Implement support for new ARIA roles: code, strong, emphasis, generic.
  - Fix handling of content type with new custom protocols implementation.
  - Make image decoders fully thread safe.
  - Add support for get page source command in WebDriver.
  - Add support for network proxy capabilities in WebDriver.
  - Add support for new window command in WebDriver.
  - Fix several crashes and rendering issues.
  - Translation updates: Brazilian Portuguese, Ukrainian.