Mozilla has released Firefox 4 Beta 2 yesterday, a new beta version of the upcoming Firefox 4 web browser. The new version can be downloaded from the release notes or official beta download page. It is as usual available for all supported operating systems (Linux, Mac, Windows) and languages.
The “big” new feature in Firefox 4 Beta 2 is App Tabs, which resembles Google Chrome’s Pin Tab feature. Every tab in Firefox has a new option on right-click to convert it into an App Tab. Those tabs are reduced to their Favicon and placed on the leftmost side of the tabbar.
Mozilla developers have created a short video to demonstrate the new App Tab feature
A new page loading animation has been added as well, the favicon of sites in the tabbar is replaced with a loading animation, which switches back to the website’s favicon once the page has loaded fully.
The release notes contain additional changes and feature descriptions, including:
Firefox 4 Beta 2 reaches the same score in the HTML5 browser test as the last beta. The browser scores 97 of 100 points in the Acid3 test, but drops 200 points in the Peacekeeper benchmark when compared to the performance of Beta 1.
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