Mozilla has announced the launch of Aurora, a new Firefox release channel that is intended to open up experimental Firefox features to a broader audience of testers. The Aurora channel will serve up a stream of Firefox builds that are less fragile than the nightly builds but not as stable as official pre-releases.
Mozilla is transitioning to shorter release cycles and a more incremental development model. The organization aims to deliver three more major Firefox releases this year, bringing the open source Web browser's version number up to 7. As we explained in our previous coverage of Mozilla's 2011 roadmap, the transition will require much more intensive testing throughout the development cycle.
Very interesting article