Mozilla Firefox 4 beta 4
Windows Vista, Windows 7, Windows XP, Windows 2000
233MHz CPU, 64MB RAM, 52MB disk space
Beta or prerelease software is not intended for inexperienced users, as the software may contain bugs or may potentially damage your system. We strongly recommend that users exercise caution and save all mission-critical data before installing or using this software.Firefox 4 beta 4 includes dozens of major features and improvements - by testing them early we'll be able to respond to your feedback for future versions of Firefox. Once you download Firefox 4 beta 4, you're part of our beta program and will receive regular updates as more features launch.