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I have Firefox 20.0 on OSX 10.9. I want to update it but anytime an update message comes up, and I click it, it says it's updating for hours, and never updates.

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If I delete Firefox and reinstall it, how do I save my bookmarks/settings?

Thanks,

If I delete Firefox and reinstall it, how do I save my bookmarks/settings? Thanks,

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Install FEBE and make an backup. After you've reinstalled firefox, install FEBE again and restore your settings.