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Firefox 4 won't work on my Mac OSX 10.4.11, it says Firefox 3.6.17 is not secure?

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I keep getting messages to upgrade to FireFox 4, and it will not open on my Mac OSX 10.4.11. I get messages that the 3.6.17 version is not secure.

I keep getting messages to upgrade to FireFox 4, and it will not open on my Mac OSX 10.4.11. I get messages that the 3.6.17 version is not secure.

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Firefox 3.6.x versions are still updated with security patches (Firefox 3.6.18 is due in about two weeks).

You are unfortunately out of luck with an Intel Mac and OS X 10.4.11.
There is a compatible version from for a PowerPC Mac, but no alternative for an Intel Mac.