Firefox 4 Beta 4 has been released for downloads. It adds two big features, namely Firefox Sync, which will allow you to access your bookmarks, history, awesome bar settings, passwords, form-fill data and open tabs across multiple computers and mobile devices. All of this information can also be accessed on your iPhone using the Firefox Home app.
Firefox 4 also has a new feature called Firefox Panorama earlier known as Tab Candy, which brings a new approach to tab management. Firefox Panorama makes it easy to organize information allowing you to create tab groups for different tabs and also allowing you to prioritize those tabs any way you want.
Firefox Panorama also allows you to quickly see an overview of al the tabs and to quickly locate and switch between tabs or groups of tabs. You can find more information about Firefox Panorama at this post or watch the embedded video below to see it in action.
There are several other features included in Firefox 4, you can read about them in the Firefox 4 Beta 1 review or browse all content related to Firefox 4. Find more information about Firefox 4 Beta 4 and download it for your OS from the official Mozilla blog.