Firefox 3.1 Alpha 1 codename “Shiretoko” is available for download since July 28, 2008, and now Mozilla is gearing up for the release of  Firefox 3.1 Beta 1, which’s scheduled to drop by the end of August; however, nothing is set in stone. From the pre-release version of the Gecko 1.9.1 platform, namely Shiretoko Alpha 1, Mozilla needs to go to Alpha 2 stage, before jumping to Firefox 3.1 Alpha 1. Still, the proposed deadline for the Code Freeze of Firefox 3.1 Beta 1, a critical phase on the road to availability, is August 19, 2008. But at this point in time it is possible that Mozilla will not make August 19 for Code Freeze.

Source:→ Softpedia