Firefox 4 second beta now available

     Firefox today rolled down the second beta to its pre-release browser Firefox version 4 with a number of new features and improvements, most noticable of them being support for CSS 3 transitions, better handling of retained layers on pages and a new feature in the add-ons manager that confirms when an add-on has been installed. There are also some considerable performance boosts and stability improvements. This version also enables App Tabs, a similar concept that lets you miniaturize the tabs for common web apps like e-mail,  calendar or other apps that we use multiple times a day and store them in the tab bar for quick access.
The full list of update with the release is as follows :-
    Firefox 4 Beta 2 is available in 24 languages.
    Tabs are now on top by default on Windows and OSX - Linux will be changing when the theme has been modified to support the change.
    You can turn any tab into an "App Tab" by right-clicking on it and selecting "Make into App Tab" from the context menu.
    Web developers can animate content using CSS Transitions.
    Responsiveness and scrolling improvements from the new retained layers layout system.
    JavaScript speed improvements due to engine optimizations.
    Changes to how XPCOM components are registered in order to help startup time and process separation.