Firefox 4 Beta 1 already brought a large amount of new features the beta 2 version got even more features .Most of the add-ons are tested with beta 2 release but there are chances some add-ons may create problems with Firefox version 4 beta 2 release. Firefox 4 beta version includes a feedback add-on, where user’s can report issues instantly to Mozilla.
Mozilla Firefox comes with a new page building mechanism called Retained Layers. This will provide Firefox users much faster speed for web pages with dynamic content, moreover scrolling will be much smoother. Mozilla still experimenting with hardware acceleration.
One more experimenting features on Firefox 4.0 beta 2 include Apps Tabs that pins the selected tabs on the left side of the browser permanently. Here you can pin any other services like Gmail, yahoo etc.
You can view the short video Created by Mozilla developers to show the new App Tab feature:
If everything gone well we can expect a Firefox version 4 stable release this august.