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I downloaded the latest version of Firefox for my Mac OS X and after installation I am told it is not compatible with my version of Mac OS X. Can I go back to an older version of firefox? I am stuck without Firefox at all now.

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I Mac OS X 10.4.11

I Mac OS X 10.4.11

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The latest versions of Firefox require at least Mac OS X 10.5 and an Intel processor. You can revert to Firefox 3.6.xx for Mac 10.4 by downloading the installer from http://www.mozilla.org/en-US/firefox/all-older.html

More information in the Firefox won't start - find solutions article, under Firefox will not start on OS X 10.4 or earlier or with a PowerPC processor