Can’t wait to see what the next version of Firefox will look like? Whilethe final versionhasn’t been officially launched yet, the first public stable version of Firefox 4 beta 1 has been released to the public, offering a brand new UI that moves the tabs to the top, similar to Google’s Chrome. Other benefits of Firefox 4 include more support for HTML5, Google’s new WebM open video standard, better extension management, security and performance enhancements, and many others. If you’re keen to check it out, it’s currently available for Linux, Mac, and Windows systems, though Mozilla hasn’t given word as to when a release candidate or final build will be available.