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mac os 10.4.11 on ppc (i.e. pre-intel). Firefox 4 does not install. is it compatible?

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I was trying to upgrade to the newest version (4) of Firefox, but when I installed the software, I get error -10661 saying the app cannot be launched. I have Mac OS X10.4.11 (PowerPC, not Intel chip).

I was trying to upgrade to the newest version (4) of Firefox, but when I installed the software, I get error -10661 saying the app cannot be launched. I have Mac OS X10.4.11 (PowerPC, not Intel chip).

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Firefox 4 requires at least OS X 10.5 and an Intel Mac. There is a third party build that runs on OS X 10.4 and PPC Macs, for details see http://www.floodgap.com/software/tenfourfox