Beginning with Firefox 4, Macs must have an Intel x86 processor ('''''yours is a PPC Mac''''') '''''<u>and</u>''''' OSX 10.5 or higher ('''''yours is 10.4.11'''''). *System Requirements: [https://www.mozilla.org/en-US/firefox/4.0/system-requirements/index.html Firefox 4] [https://www.mozilla.org/en-US/firefox/5.0/system-requirements/index.html Firefox 5] [https://www.mozilla.org/en-US/firefox/6.0/system-requirements/index.html Firefox 6] [https://www.mozilla.org/en-US/firefox/7.0/system-requirements/index.html Firefox 7] [https://www.mozilla.org/en-US/firefox/8.0/system-requirements/index.html Firefox 8] [https://www.mozilla.org/en-US/firefox/9.0/system-requirements/index.html Firefox 9] [https://www.mozilla.org/en-US/firefox/10.0/system-requirements/index.html Firefox 10] [https://www.mozilla.org/en-US/firefox/11.0/system-requirements/index.html Firefox 11] '''''The good news''''' is that Firefox 3.6.x still supports OSX 10.4 and Macs with the PPC Mac architecture. '''''The bad news''''' is that support for the Firefox 3.6.x series is likely to end in late April 2012. *System requirements: [https://www.mozilla.org/en-US/firefox/3.6/system-requirements/index.html Firefox 3.6.x] *Download Firefox 3.6.x: https://www.mozilla.org/en-US/firefox/all-older.html *Also see --> http://support.mozilla.com/en-US/kb/Installing+Firefox+on+Mac You can try the third-party product '''''TenFourFox''''' that supports PPC Macs with OSX 10.4.11 and OSX 10.5.8. Firefox 10.0.3 version of '''''TenFourFox''''' is available. The product is based on Firefox released versions (10.0.3 version numbering appears to be the [https://www.mozilla.org/en-US/firefox/organizations/ ESR] version of Firefox for extended support to corporate environments/organizations). All support is provided by the developer, not by this site: *Home page: http://www.floodgap.com/software/tenfourfox/ *Developer's blog: http://tenfourfox.blogspot.com/ *'''''VERY IMPORTANT'''''; '''read this carefully''': https://code.google.com/p/tenfourfox/wiki/ReleaseNotes90 *'''''VERY IMPORTANT'''''; '''read this carefully''': https://code.google.com/p/tenfourfox/wiki/PluginsNoLongerSupported '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''

I have an iMAC with intel processor but with 10.4.1 All I want is ("old") Firefox back - which I had and really liked for years ! How can you take that away from me ? Also, I have not idea as to what a PPC MAC is - can someone tell me that?

Hi nander2, PPC is a different CPU that was used in Macs for many years. Mozilla is recommending for security reasons that users who cannot run the current generation of Firefox consider another modern browser. If you really can't live without Firefox 3.6.28, and accept that it does have publicly disclosed security vulnerabilities which could allow very bad things to happen to your computer, you can find the old version [ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/3.6.28/mac/ here].

'''nander2''', see https://www.mozilla.org/en-US/firefox/all-older.html for Firefox 3.6.28 Since you have a Intel mac and if you can update to OSX 10.5.x you may be able to even use the current Firefox version. As of Firefox 4.0 one needs both a Intel Mac and at least OSX 10.5