Apple releases Safari 4, the world’s fastest and most innovative web browser. Available for Mac and Windows PCs and introduced as a beta in February of this year, Safari 4 features the Nitro engine which runs JavaScript up to 4.5 times faster than Safari 3. Safari 4 makes browsing more intuitive and enjoyable with innovative features, such as Top Sites, Full History Search and Cover Flow, and support for modern web standards like HTML 5 and advanced CSS Effects.