Mozilla has announced this week the availability of Firefox 3.1 Beta 3, and with it also came the announcement that Firefox 3.1 may even become Firefox 3.5.

But first things first, Firefox 3.1 comes with several new features and improvements to performance, web compatibility and speed. The Private Browsing Mode now includes the ability to ‘Forget This Site’ from the History sidebar.

Firefox 3.1 also comes with improved performance and stability thanks to the new TraceMonkey JavaScript engine, and now has native JSON support. Improvements have also been made to the Gecko layout engine, which includes speculative parsing for faster content rendering.

The new version also offers support for new web technologies such as the