A faster, more secure and customizable Web browser...System requirements according to different systems are as Windows Operating Systems Windows XP SP2 Windows Server 2003 Windows Vista Windows 7 Windows 8 Please note that while the 32-bit and 64-bit versions of Windows Vista and Windows 7 can be used to run Firefox 19, only 32-bit builds of Firefox 19 are supported at this time. Recommended Hardware Pentium 4 or newer processor that supports SSE2 512MB of RAM 200MB of hard drive space Mac Operating Systems Mac OS X 10.6 Mac OS X 10.7 Recommended Hardware Macintosh computer with an Intel x86 processor 512 MB of RAM 200 MB hard drive space Linux Software Requirements Please note that Linux distributors may provide packages for your distribution which have different requirements. Firefox will not run at all without the following libraries or packages: GTK+ 2.18 or higher GLib 2.22 or higher Pango 1.14 or higher X.Org 1.0 or higher (1.7 or higher is recommended) libstdc++ 4.3 or higher For optimal functionality, we recommend the following libraries or packages: NetworkManager 0.7 or higher DBus 1.0 or higher HAL 0.5.8 or higher GNOME 2.16 or higher