Mozilla has just released its Firefox 4 beta 4 which includes a number of new features, the most noteworthy being Panorama tabs, formally known as tab candy. The feature provides an Expose´ style visual interface for switching, organizing, and managing tabs and tab sets. A demo of the new feature is shown in the video below.
Other features included in this latest release of Firefox 4 include Direct2D graphics acceleration for Windows, and buffered HTML5 video. Also included is the final version of Sync, which allows users to sync history, bookmarks, and autofill data from one computer to another.
You can grab the Firefox 4 Beta 4 for Mac, Windows, or Linux here.