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want to undo recent download

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How can I undo recent upgrade? I'm having problems opening programs.

How can I undo recent upgrade? I'm having problems opening programs.

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Actually, it looks like you're using Firefox 3.6.x, which is a very old version of Firefox by now. The latest version is Firefox 9. You should upgrade asap to stay secure and protected. Follow the instructions here: https://support.mozilla.com/en-US/kb/Updating%20Firefox?s=updating+firefox&r=0&as=s#w_how-do-i-manually-check-for-updates