Mozilla Firefox 3 Release Candidate 3 is available in more than 45 languages as a public preview release intended for developer testing and community feedback. It includes more new features as well as dramatic improvements to performance, memory usage & speed.

Download Firefox 3.0 : http://download.mozilla.org

Improved Performance for firefox 3.0

• Speed: improvements to our JavaScript engine as well as profile guided optimizations have resulted in continued improvements in performance. Compared to Firefox 2, web applications like Google Mail & Zoho Office run twice as fast in Firefox 3, and the popular SunSpider test from Apple shows improvements over previous releases.
• Memory usage: Several new technologies work together to reduce the amount of memory used by Firefox 3 over a web browsing session. Memory cycles are broken & collected by an automated cycle collector, a new memory allocator reduces fragmentation, hundreds of leaks have been fixed, and caching strategies have been tuned.
• Reliability: A user’s bookmarks, history, cookies, and preferences are now stored in a transactionally secure database format which will prevent data loss even if system crashes.