The latest version of Firefox is available for download. This version brings browsing performance enhancements, automatic updates, re-ordering of browsing tabs, security enhancements, increased support of web standards such as SVG, CSS 2, CSS 3 and Javascript 1.6 and much more.
The release notes for version 1.5 are located here. Also a comprehensive list of updates can be found here.
What are you waiting for? Go download it!