The first major version of Firefox since 3.0 was released today as predicted by Neowin.net

So what’s new in 3.5? According to the release notes they are

• Improved tools for controlling your private data, including a Private Browsing Mode.
• Better performance and stability with the new TraceMonkey javascript engine.
• The ability to provide Location Aware Browsing using web standards for geolocation.
• Support for native JSON, and web worker threads.
• Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.
• Support for new web technologies such as: HTML5, ‘video’ and ‘audio’ elements, downloadable fonts and other new CSS properties, javascript query selectors, HTML5 offline data storage for applications, and SVG transforms.

You can download the the new version from Mozilla’s website