Mozilla Firefox is considered to be the second-most widely used browser worldwide, after Internet Explorer, Firefox uses the Gecko layout engine to display Web pages.

It includes tabbed browsing, a spell checker, incremental find, live bookmarking,a download manager, and an integrated search system that use the search engine you want it to. Firefox 3 comes with dozens of new feature, including the smart location bar, one-click bookmarking and blindingly fast performance.

It integrates elegantly with the installed anti-virus software so that when you download a file, your computer's anti-virus program automatically checks it to protect you against viruses and other malware, which could otherwire damage your computer.

This feature is available only in Windows version of the browser.