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cannot upgrade firefox beyound version 2.0.0.20?

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I am on a Mac G4 running 10.3.9 and can not upgrade firefox beyond version 2.0.0.20. Is this correct?

I am on a Mac G4 running 10.3.9 and can not upgrade firefox beyond version 2.0.0.20. Is this correct?

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That is correct, Firefox 3.* versions require at least OS X 10.4, and Firefox 4 will require OS X 10.5

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Do you know if I can upgrade my G4 Mac to run OS X 10.4 or not?