Mozilla Released Beta 5 of Firefox 3.6 late Thursday afternoon.

The Beta of Firefox 3.6 / Gecko 1.9.2 introduces several new features for users to evaluate:

• Support for the HTML5 File API
• A change to how third-party software integrates with Firefox to increase stability.
• The ability to run scripts asynchronously to speed up page load times.
• 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• Firefox 3.6 will alert users about out of date plugins to keep them safe.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 displayed 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.

Current Firefox 3.6 Beta users can upgrade via the Check for Updates option in the Help Menu.

Source: Mozilla Developers News