If you haven't been test driving the beta, here are the new features.

The ‘Top Sites’ page allows you to navigate to your favorite websites by previewing up to 24 thumbnails all in one page. You can also personalize the display by relocating each in the grid, making it easier for you to find your top sites. You can also tell if each top site has changed since your last visit when you see a white star on the top-right corner by looking on the grid page. And, of course, each would be at your disposal.

If you're a fan of Cover Flow, Safari has you covered. Now you can review your site history and bookmarked sites in full-page versions, just like iTunes or navigating the Finder. 

Can’t find what you’re looking for? Just type what you’re looking for in the ‘Search’ bar. Typing a simple word or phrase will search through the whole browser. 

Apple reports that Safari  is the world’s fastest web browser, overshadowing Firefox, Internet Explorer, and Chrome. ‘Nitro Engine’ performs JavaScript at almost 8 times faster than Internet Explorer 8 and more than 4 times faster than Firefox 3 (testing on iBench and SunSpider). 

‘Developer Tools’ allows you observe the structure of a page, debug JavaScript, optimize performance and compatibility, inspect offline databases, or test experimental pieces of code. Click here for more information and here for all 150 features.

Download and enjoy the new Safari 4 here for free! Happy browsing.