Source www.apple.com Press Release.

CUPERTINO, California—June 12, 2009—Apple® today announced that more than 11 million copies of Safari® 4 have been downloaded in the first three days of its release, including more than six million downloads of Safari for Windows. Safari 4 is the world’s fastest, most innovative browser and is built on the world’s most advanced browser technologies including the new Nitro JavaScript engine that executes JavaScript nearly eight times faster than IE 8 and more than four times faster than Firefox 3. Safari quickly loads HTML web pages more than three times faster than IE 8 and three times faster than Firefox 3.*

“Safari 4 is an incredible success on Mac and Windows with more than 11 million downloads in the first three days,” said Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing. “Safari users love the incredible speed and innovative features like Top Sites, Full History Search and Cover Flow.”

Starting with the development of the open source WebKit browser engine, Apple has been leading the industry in defining and implementing innovative web standards. Safari 4 includes HTML 5 support for offline technologies and support for advanced CSS Effects, enabling an entirely new class of web applications that feature rich media, graphics and fonts. Safari 4 is the first browser to pass the Web Standards Project’s Acid3 test, which examines how well a browser adheres to CSS, JavaScript, XML and SVG standards that are specifically designed for dynamic web applications.

Safari 4 includes Top Sites, for an incredible visual preview of frequently visited and favorite pages; Full History Search, to search through titles, web addresses and the complete text of recently viewed pages; and Cover Flow®, to easily flip through web history or bookmarks. Other innovative features include Smart Address Fields for automatically completing web addresses from an easy to read list of suggestions; Search Fields, to fine tune searches with recommendations from Google Suggest or a list of recent searches; and Full Page Zoom, for a closer look at any website without degrading the quality of the site’s layout and text.

In Mac OS® X Snow Leopard™, available later this year, Safari runs as a 64-bit application, boosting the performance of the Nitro JavaScript engine by up to 50 percent.** Snow Leopard makes Safari more resistant to crashes by running plug-ins in a separate process, so even if a plug-in crashes, Safari continues to run and the user simply has to reload the affected page. Safari running on Snow Leopard also delivers HTTP streaming, making it easy to deliver high-quality audio and video in industry standard formats from any web server without the need for browser plug-ins.