From then on everything goes automatically. Mozilla Firefox is very easy to install: launch Utilu Silent Setup for Mozilla Firefox. Also there are a lot of handy extensions available for Firefox. Mozilla Firefox is a free web browser based on the Gecko render engine, which follows the W3C Web Standards much better then Windows Internet Explorer. It includes a popup blocker, tabbed browsing, a smarter search, hassle free downloading and improved privacy and security. Mozilla Firefox (formerly Firebird, which was formerly Phoenix) is a redesign of Mozilla's browser component, written using the XUL user interface language and designed to be cross-platform.