Many Mozilla community members, including both volunteers and Mozilla Corporation employees, have been helping to reduce Firefox's memory usage and fix memory leak bugs lately. Hopefully, the result of this effort will be that Firefox 3 uses less memory than Firefox 2 did.

Includes some optimizations for MacOSX

Firefox is the most popular open source web browser in the world. Firefox is based on Mozilla’s Gecko rendering engine and is available on many platforms, including OSX, Windows and Linux. Firefox’s strength lies in a clean and simple interface with a simple but useful feature set, such as popup blocking, password saving, and tabbed browsing. Additionally, Firefox has the largest 3rd party plugin community, with hundreds of useful extensions available.