Firefox 2.0.0.20 is the last ever release for Mac OSX 10.3.9 and earlier versions. Which version of OSX do you have?

Firefox versions 3.0 and higher require OSX 10.4 and higher: [http://www.mozilla.com/firefox/system-requirements-v3.html] [http://www.mozilla.com/firefox/system-requirements.html] [ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.20/mac/en-US/Firefox%202.0.0.20.dmg Firefox version 2.0.0.20] is the last ever version of Firefox for OSX 10.3.9 and lower. However, I would think about finding/creating an unofficial build of Firefox 3 for older Mac (if you cannot get next version of Mac OSX). If it's possible. I don't know. Tiger install DVDs are in short supply. Tiger is no longer available at the Apple Store but may be available for $129 by calling Apple Phone Sales @ 1-800-MY-APPLE (1-800-692-7753). Tiger Requirements... To use Mac OS X 10.4 Tiger, your Macintosh needs: * A PowerPC G3, G4, or G5 processor * Built-in FireWire * At least 256 MB of RAM (I recommend 1GB minimum) * DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation * At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools