The latest beta version of Firefox in form of version 3.6b1 is officially available for download. It features built-in support for themes (Personas), improved performance, and more.

Features include:

• Users can now change their browser’s appearance with a single click, with built in support for Personas.
• Firefox 3.6 will alert users about out of date plugins to keep them safe.
• Open, native video can now be full screen, and supports poster frames.
• Support for the WOFF font format.
• Improved JavaScript performance, overall browser responsiveness and startup time.
• Support for new CSS, DOM and HTML5 web technologies.

Download Here

Via Life Hacker