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how do I install firefox 3.6 when firefox 4 is the only option

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I tried to upgrade to firefox 4, could not upgrade but totally lost firefox 3.6. Where can I find firefox 3.6 and how do I reinstall firefox 3.6.

I tried to upgrade to firefox 4, could not upgrade but totally lost firefox 3.6. Where can I find firefox 3.6 and how do I reinstall firefox 3.6.

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For older Macs that aren't supported in Firefox 4.0, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8 .
http://www.floodgap.com/software/tenfourfox/

You can get 3.6.16 here:
http://www.mozilla.com/en-US/firefox/all-older.html

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thank you the-edmeister, you have been most helpful and have solved my problems.