Mozilla has announced the availability of Firefox 3.1 beta 3. Firefox 3.1 introduces support for the HTML 5 video element, the new high-performance TraceMonkey JavaScript engine, and several other compelling features.

Mozilla has announced the availability of the third beta release of Firefox 3.1. This beta irons out some bugs and moves the browser a step closer towards the final release.

Firefox 3.1 was originally intended to be an incremental update targeted for release in late 2008. Plans changed, however, and the feature set grew significantly. As a result of the delays and the large number of noteworthy improvements that are now included in the code base, the developers are presently working on changing the version number from 3.1 to 3.5.