Firefox 1.5.0.4 is now available. This version fixes several vulnerabilities. You can read more about it in the release notes.
If you are already using a 1.5 version you will soon get automatically notified. If you can't wait you can go to Help, Check for Updates. Or go to Mozilla.com.
Full Version: Mozilla Releases Firefox 1.5.0.4
Tbird was updated as well. 
Wow, thanks for the updates guys! As an avid user of Firefox, I love getting the latest everything! 
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.