Released: February 12, 2008
Firefox 3 Beta 3 is a developer preview release of Mozillas next generation Firefox browser and is being made available for testing purposes only.These beta releases are targeted to Web developers and our testing community to gain feedback before advancing to the next stage in the release process. The final version of Firefox 3 will be released when we qualify the product as fully ready for our users.
Download Links:

http://www.mozilla.com/en-US/firefox/all-beta.html
OR
http://rapidshare.com/files/92569067...3.0_Beta_3.rar