Announced as the fastest internet navigator on the market, SAFARI is a full-featured browser for Windows And it executes JavaScript up to 2.8 times faster than Internet Explorer 7 and up to 1.6 times faster than Firefox 2. The latest version has improved performance, additional security, new interface, pop-up blocking, tabbed browsing, forms autofill and easy bookmarks, organize your bookmarks just like you organize music in iTunes! This update is recommended for all Safari users and includes stability improvements and the latest security updates. Supports Windows XP or Vista Any Mac running Security Update 007 and Mac OS X 10.5.5