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Are there any Firefox upgrades from 2.0.0.20 for MAC OS X 10.39?

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Ever since Firefox suggested upgrade to 3.6 I have been unable to reply or create new e-mail. I have an older Mac OS X 10.39 and am unable to upgrade to the Firfox version 3.6 from the existing version 2.0.0.20.

Ever since Firefox suggested upgrade to 3.6 I have been unable to reply or create new e-mail. I have an older Mac OS X 10.39 and am unable to upgrade to the Firfox version 3.6 from the existing version 2.0.0.20.

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There are no updates available for you, Firefox 2.0.0.20 is the last version that works on OS X 10.3.9, later versions of Firefox require at least OS X 10.4