With Firefox 3.5 release coming near, Mozilla has already started working on Firefox’s next version codenamed Namoroka that is scheduled to launch in mid 2010. The pre-alpha builds are already out for Windows, Mac, and Linux. To keep day-to-day tab on the nightly builds, follow the link given at the bottom.
The release is being called Firefox 3.6, but should not be considered as a final name since it might later be called as Firefox.Next due to vast improvements and new features. To learn what’s new in Firefox 3.6, visit the Mozilla Links blog.