I cant install the lastest firefox on my Mac. Can you please advise me which version is the newest ot use on my Mac 10.5.8 GHz PowerPC G5?

Firefox 4 requires at least OS X 10.5 and an Intel Mac. * http://www.mozilla.com/firefox/4.0/system-requirements/ For an unofficial Firefox 4 compatible version (TenFourFox) that runs on PowerPC Macs with OS X 10.4.11 or OS X 10.5.8 you can look at: * http://www.floodgap.com/software/tenfourfox/ Firefox 3.6.x (Mac OS X 10.4 and later) can be found here: * http://www.mozilla.com/en-US/firefox/all-older.html