With more than 15,000 improvements, Firefox 3 is faster, safer and smarter than ever before.

Mozilla Firefox is a free and open source web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. Firefox had 21% of the recorded usage share of web browsers as of January 2009, making it the second-most popular browser in current use worldwide, after Internet Explorer.

To display web pages, Firefox uses the Gecko layout engine, which implements some current web standards plus a few features which are intended to anticipate likely additions to the standards.

Firefox includes tabbed browsing, a spell checker, incremental find, live bookmarking, a download manager, and an integrated search system that uses the user's desired search engine. Functions can be added through add-ons created by third-party developers.