You '''can not use version 8.0.x on your 10.4.11 mac with ppc''' http://www.mozilla.org/en-US/firefox/8.0/system-requirements/ Firefox 4 versions and later do not run on a PowerPC Mac and require at least OS X 10.5 and an Intel Mac. '''latest supported version for your os is 3.6.24''' you can download from here: http://www.mozilla.org/en-US/firefox/all-older.html For older Macs that aren't supported in Firefox 4+ versions '''if you like''' try TenFourFox for PowerPC's running Mac 10.4.11(like yours) & 10.5.8 http://www.floodgap.com/software/tenfourfox/ http://tenfourfox.blogspot.com/ https://code.google.com/p/tenfourfox/wiki/PluginsNoLongerSupported see also: [http://support.mozilla.com/en-US/kb/Installing%20Firefox%20on%20Mac Installing Firefox on Mac] thank you Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

Thanks. this was a life saver