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Have firefox 2.0.0.20/upgraded my mac operating system to 10.4.11, and how do I upgrade firefox to 3.6 if that is best

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I presently have firefox 2.0.0.20. which I used on my older os 20.28 for my mac. I just upgraded my mac os to a 10.4.11. I have been told that firefox 4.0 doesn't work on this os and to use 3.6 firefox...is that correct and if so how do I get it to download? thank you. MMHR

I presently have firefox 2.0.0.20. which I used on my older os 20.28 for my mac. I just upgraded my mac os to a 10.4.11. I have been told that firefox 4.0 doesn't work on this os and to use 3.6 firefox...is that correct and if so how do I get it to download? thank you. MMHR

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For older Macs that aren't supported in Firefox 4.0, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8 .
http://www.floodgap.com/software/tenfourfox/