Firefox 3.1 beta 2 has been released and available for download. Firefox 3.1 Beta 2 is available in over 50 languages as a public preview release intended for developer testing and community feedback. It includes:

• Firefox 3.1 Beta 2 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past 7 months.
• This beta is now available in 54 languages – get your local version.
• Added a new Private Browsing Mode.
• Added functions to make it easy to clear recent history by time as well as remove all traces of a website.
• New support for web worker threads.
• The new TraceMonkey JavaScript engine is on by default for web content.
• Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.
• Removed the new tab-switching behavior based on feedback from users
• Support for new web technologies such as the and elements, the W3C Geolocation API, JavaScript query selectors, CSS 2.1 and 3 properties, SVG transforms and offline applications.

=> Download Firefox 3.1 beta 2