free download mozilla firefox browser...Upgrade To The Latest Firefox® for 2011!Mozilla Firefox is a free and open source web browser descended from the Mozilla Application Suite and managed by Mozilla Corporation. As of March 2011[update], Firefox is the second most widely used browser with approximately 30% of worldwide usage Browsers compiled from Firefox source code may run on various operating systems; however, officially distributed binaries are meant for the following: Microsoft Windows (2000, XP, Server 2003, Vista or 7), Mac OS X 10.5, Mac OS X 10.6 and Linux (with the following libraries installed: GTK+ 2.10 or higher, GLib 2.12 or higher, Pango 1.14 or higher, X.Org 1.0 or higher (1.7 or higher is recommended), libstdc++ 4.3 or higher). Official recommended hardware requirements are a Pentium 4 or newer that supports SSE2 and 512 MB RAM for the Windows version or Macintosh computer with an Intel x86 processor and 512 MB RAM for Mac version.[120] Official minimum hardware requirements are a Pentium 233 MHz and 64 MB RAM for the Windows version or Macintosh computer with an Intel x86 or PowerPC G3, G4, or G5 processor and 128 MB RAM for Mac version.[121][citation needed]