Mozilla has declared the availableness of Firefox 3.1 beta 3. Firefox 3.1 brings out support for the HTML 5 video element, the fresh high-performance TraceMonkey JavaScript engine, and various other obligating features. This beta irons out some bugs and propels the browser a step nearer towards the final release. Firefox 3.1 was in the first place destined to be an additive update aimed for release in late 2008. Plans changed, nevertheless, and the feature set arose importantly. As a effect of the holds up and the large number of remarkable betterments that are now admitted in the code base, the coders are currently working on altering the version number from 3.1 to 3.5.The 3.1 release will bring a great deal of very impressive modifications, including performance enhancements and new features for users and developers. It includes Firefox’s new high-performance TraceMonkey JavaScript runtime which importantly hikes up the speed of script execution. In addition to quicker performance, the JavaScript engine has also acquired support for background processing with the new worker threads feature. Native JSON parsing support will also step-up performance for certain forms of dynamic Web applications. Firefox 3.1 delivers more plenteous multimedia with support for the new HTML5 canvas element which is powered by a built-in Ogg codec. There are also some fresh rendering effects like support for using SVG filters on HTML. New CSS3 features implemented in 3.1 include shadows and border images.