SAN FRANCISCO, USA: Apple today released Safari 4, 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.

"The successful beta release helped us fine tune Safari 4 into an even better, faster version that customers are going to love," said Philip Schiller, Apple's senior vice president of Worldwide Product Marketing.

"Safari is enjoyed by 70 million users worldwide and with its blazing fast speed, innovative features and support for modern web standards, it's the best browser on any platform," added Schiller.

According to the press release, Safari 4 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.

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 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.