Firefox 3.1 Beta 2 is available for Windows, Macintosh, and Linux in 55 different languages. It also comes with a new function that will make it easy to remove the history of your past few hours of browsing, or remove all traces of a website. Well, the new tab-switching & preview behavior has been removed, based on feedback from Beta 1 users.
Note that, this release is meant for testing purposes only. So, it is recommended that you read the complete release notes and known issues before installing this beta version of Firefox. For more information about this release, visit – http://www.mozilla.com/firefox/all-beta.html