We’ve already experienced the great UI of Mozilla Firefox 4 since the release of the first beta.
It comes with dozens of features and improvements, and additional modifications have been made on Beta 2 including the “App Tab” and JavaScript speed.

The latest beta version, Firefox 4 Beta 4 is now available as a preview release. Among the new changes of the latest beta includes:

  • Firefox 4 Beta 4 is available in 39 languages.
  • Firefox Sync is now included by default.
  • A new feature gives users a visual overview of all open tabs, allowing them to be sorted and grouped.
  • An experimental API is included to provide more efficient Javascript animations.
  • Firefox now supports the HTML5 video “buffered” property.

Still, Firefox 4 Beta 4 is based on the Gecko 2.0 Web platform. It’s considered to be stable and safe to use for daily web browsing, however, the features may be changed before the final version is released. You can download Firefox 4 Beta 4 here. Localized versions are available here.

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