The TraceMonkey JavaScript engine brings screaming fast performance to Firefox 3.5. With JavaScript that's more than twice as fast as Firefox 3 and 10x faster than Firefox 2, you’ll be able to see the difference without breaking out your stopwatch.

Offline Support

Firefox 3.5 supports HTML 5 offline resource caching. This lets Web applications cache static content on the user’s system for reuse instead of requiring it to be reloaded over the network each time it’s needed. The result: much faster web application load times.

Privacy

More ways to maintain your privacy while you’re online:

Browsing Set your browsing mode to private and leave no trace of past Web history.	Clear History Delete where you’ve been on the Web after the fact—simple and easy.
Pick Your Privacy Remove the history of your visits to a particular site but retain the rest of your browsing history.	Easy Options Firefox asks you straight up about how to store your history and gives you fine-tuned privacy control over the Awesome Bar.

When you enable Opera Turbo in Opera 10, it will use our powerful servers to compress Web pages, boosting and accelerating connections to a crowded Wi-Fi in a cafe or a tethered mobile phone.
The new Opera Presto 2.2 engine in Opera 10 is up to 40% faster on resource-intensive pages such as Gmail and Facebook. In addition, with an Acid3 100/100 score, Web Fonts support, RGBA/HSLA color and SVG improvements, Opera 10 is ready for the next generation of Web applications.
Opera 10 to use system resources intelligently and to give you the best possible performance on your computer. With an elegant under-the-hood architecture and a beautiful new skin by designer Jon Hicks on top, Opera 10 feels, looks and runs like a fine-tuned machine.

Flock is built on the Mozilla Firefox open-source browser, so it has all the features you've come to expect in a high-quality web browser, like intuitive buttons and menus, personal customizability, reliable security, enhanced privacy protections, and automated updating. However, Flock is much more than that! The Flock Social Web Browser has been fully integrated with a wide range of social networking websites and popular blogging tools.

So with Flock, you can now keep in touch and share text, links, pictures, video and more with friends, family and co-workers across the entire internet with unparalleled speed and seamless ease.

Before Safari, browsers were an afterthought. Something you put up with if you wanted to surf the internet. One browser looked and felt just like another, so you chose the one that worked the best and crashed the least. They were ugly, cluttered affairs, whose interfaces competed for your attention and made browsing — the very purpose for which they were created — more difficult. Safari changes all that.
Safari is designed to emphasize the browsing, not the browser. The browser frame is a single pixel wide. You see a scroll bar only when needed. By default, there’s no status bar. Instead, a progress gear turns as your page loads. And if you so choose, you can hide almost the entire interface, removing virtually every distraction from the browser window. A great browser should get out of your way and let you simply enjoy the web. Safari does just that. And it does it regardless of platform.
The first browser to deliver the “real” internet to a mobile device, Safari renders pages on iPhone and iPod touch just as you see them on your computer. But this is more than just a scaled down mobile-version of the original. It takes advantage of the technologies built into these multi-touch devices. The page shifts and reformats to fill the window when you turn it on its side. You zoom in just by pinching and extending your fingers. Of course, no matter how you access it, Safari is always blazing fast and easy-to-use.

Google Chrome is a web browser released by Google which uses the WebKit layout engine and application framework. It was first released as a beta version for Microsoft Windows on 2 September 2008, and the public stable release was on 11 December 2008. The name is derived from the graphical user interface frame, or "chrome", of web browsers. In September 2009, Chrome was the fourth most widely used browser, with 2.84% of worldwide usage share of web browsers. versions of Chrome for Linux and Mac OS X were released in June 2009.

Google released the entire source code of Chrome, including its bespoke V8 JavaScript engine as an open source project entitled Chromium, in 2008. This move enabled third-party developers to port the browser to the Linux and Mac OS X platforms, apart from being able to study the underlying source code. A Google spokesperson also expressed hope that other browsers will adopt V8 to help web applications.The Google-authored portion of Chromium is released under the permissive BSD license, which allows portions to be incorporated into both open source and proprietary software programs. Other portions of the source code are subject to a variety of different open-source licenses. Chromium implements the same feature set as Chrome, but has a slightly different logo.