Firefox users, expect your browser to prompt you with a minor update sometime in the next day or so; Mozilla has just released Firefox 3.5.7, a tiny update addressing a common stability issue and changing the way major updates are presented to users. (Apparently the migration of users from 3.0 to 3.5 has been less than expected.) If you don't feel like waiting for your browser to auto-update, you can head straight to the download page to grab the latest.

Download: http://www.mozilla.com/en-US/firefox/personal.html
Source: http://lifehacker.com/5440923/firefox-357-update-addresses-stability-issue-tweaks-how-updates-work