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MAC 0S 10.3 FIREFOX WILL NOT START--THE OLDER VERSION WORKED PERFECTLY-- HOW DO I GET IT FOR MY WIFE'S COMPUTER

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an update was sent to my wife's computer. she tried to use it ,but it would not open. the older version worked fine ,but it was erased by the upgrade. How do we get the old version back? the upgrade--yahoo_firefox_3.6_set_us.dmg-firefox will not open.

an update was sent to my wife's computer. she tried to use it ,but it would not open. the older version worked fine ,but it was erased by the upgrade. How do we get the old version back? the upgrade--yahoo_firefox_3.6_set_us.dmg-firefox will not open.

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The last version of Firefox that works in OS 10.3 is Firefox 2.0.0.20, you can get it from ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/2.0.0.20/mac/en-US/