Mozilla Firefox 4 Beta version is now available for download with new features and improvements. A new Feedback add-on is included in Firefox 4 Beta which enables users to send feed back on their experience. Any data sent will be only with your permission. Mozilla uses this information in studies for fixing bugs and future development.

New features in Firefox 4 Beta includes updated tab interface with tabs kept on the top of the browser like chrome and opera 5.0, New Add-ons manager, WebM and HD Video support that meets HTML5 video standards to open HD quality video, Improved privacy, Improved HTML5 and CSS support.

Firefox 4 Beta includes improved navigation in windows version which makes shifting through tabs more easier right from adress bar. When you start typing the url that is already opened in another tab you will get an option to switch to that tab right from the address bar.

The menu in Firefox 4 Beta windows version is taken into single button which enables easy access to the menu items without much clutter. But there is a backlog for linux and Mac users is that the improved tab interface as in chrome is not available for linux and mac versions of Firefox 4 Beta presently. These features will be available for linux and mac users also very soon.