Firefox 4 has several new features that weren’t available in previous versions of the browser. The new Add-ons Manager makes it faster and easier to find and install add-ons in Firefox 4.
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Manage Add-ons in Firefox 4
Between Twitter, Facebook, Delicious and numerous RSS feeds, it is no wonder our online lives feel chaotic. Finding a single article you just know you saved somewhere can be dizzying. Faveous connects to our favorite social networks and RSS feeds to keep all of our marked favorites in a single place, making them easy to find when needed.

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Save Your Favorite Articles, Tweets and Links in One Place
Mozilla created Firefox 4 with an extremely useful feature – App Tabs. The purpose of App Tabs is to place any website in permanent tab from at the top of your Firefox window

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Firefox 4 Tips: Using App Tabs
One of the problems with so many vendors coming out with new and improved versions of their browsers all the time is it gets rather hard to keep up with all the new features; Google Chrome is just one case in point.

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How to use Google Chrome’s Latest Tab Features
As more users worldwide have connected to the Internet, more and more security threats have surfaced on websites. As web use continues to grow, this trend is likely to increase as well

Follow this link:
Check Websites for Security Threats Using Internet Explorer 9′s SmartScreen Filter