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The direction for uninstall firefox starts with "(If firefox is open)" does this mean firefox has to be open to uninstall. I want to uninstall to reset

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I wan to complete uninstall Firefox to reinstall it again. But the direction for uninstalling starts with "(if firefox is open)" This is mean firefox has to be open when installing.

Also if I uninstall firefox and there is a problem. Can I use window 7 system restore to restore the exact version of Firefox I uninstall?

I wan to complete uninstall Firefox to reinstall it again. But the direction for uninstalling starts with "(if firefox is open)" This is mean firefox has to be open when installing. Also if I uninstall firefox and there is a problem. Can I use window 7 system restore to restore the exact version of Firefox I uninstall?

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Firefox must *not* be running before you attempt to uninstall it.

Have you tried refreshing Firefox? The overwhelming majority of problems can be resolved by following these steps.

Refresh Firefox - reset add-ons and settings