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I use MacIntosh, system 10.5.8. But I keep getting pop-ups . I have tried to install Firefox and it responds saying it is not compatible with my systems architecture. What should I do to stop the pop-up?

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I use G4 MacIntosh, System 10.5.8. I keep getting pop-ups asking me to upgrade my version of Firefox. But when I try to install I get the message that Firefox cannot operate with my computers architecture. How can I stop the pop-ups?

I use G4 MacIntosh, System 10.5.8. I keep getting pop-ups asking me to upgrade my version of Firefox. But when I try to install I get the message that Firefox cannot operate with my computers architecture. How can I stop the pop-ups?

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I believe Firefox 4 is Intel only. That means it will not install on a PPC Mac. You can get TenFourFox, which is made for PPCs.

http://www.floodgap.com/software/tenfourfox/