Mozilla Firefox Aurora is a developmental channel for new Mozilla Firefox releases. It is designed to showcase the more experimental builds of Firefox. The Aurora channel allows users to experience the newest Firefox innovations in an unstable environment and provide feedback on features and performance to help determine what makes the final release.
What's new in this version:
Version 22.0a2 followed display scaling options to render text larger on high-res displays, added the ability to only allow cookies from sites you've visited, and improved WebGL rendering performance through asynchronous canvas updates.