I want to tackle some of the more basic questions people have about Firefox. What could be more basic a question than “What is Firefox?”. It like Opera and Internet Explorer is a Web browser. It allows you to view Web sites on the thing we call the Internet or World Wide Web. Here is the definition of Firefox from Wikipedia:
Mozilla Firefox is a graphical web browser developed by the Mozilla Corporation and a large community of external contributors. Firefox, officially abbreviated as Fx or fx and popularly abbreviated FF, started as a fork of the Navigator browser component of the Mozilla Application Suite. Firefox has replaced the Mozilla Suite as the flagship product of the Mozilla project, under the direction of the Mozilla Foundation.
Mozilla Firefox is a cross-platform browser, providing support for various versions of Microsoft Windows, Mac OS X, and Linux. However, the source code has been unofficially ported to other operating systems, including FreeBSD, OS/2, Solaris, SkyOS, BeOS and more recently, Windows XP Professional x64 Edition.
Firefox’s source code is freely available under the terms of the Mozilla tri-license as free and open source software.