FireFox3 has release, here are some features about it

1. Tabs have been made easier to use than before. You can now reopen the accidentally closed tabs from the “recently closed tabs” in History menu. A cool new feature lets you scroll through tabs easily to see them all and access the one you want quickly

2. Zoom feature lets you zoom in and see entire web pages. They scale in the way you’d expect them to, with all the elements of a page’s layout expanding equally, so you can zero in on what matters.

3. Performance is improved and I can experience it much better than before while I have tons of tabs open in the same browser window.

4. Moreover, password manager, one-click bookmarking, smart location bar [enter a term for instant matches that make sense], more security with instant web site ID are some more important features mentioned in the official

If you wat to try it you may download it from here