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I can't install firefox again.

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I couldn't open Firefox so I tried to troubleshoot it but it says "close Firefox before running this program." I didn't have it open. I tried to uninstall and reinstall but it won't do that either. Thanks

I couldn't open Firefox so I tried to troubleshoot it but it says "close Firefox before running this program." I didn't have it open. I tried to uninstall and reinstall but it won't do that either. Thanks

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Did you restart to see what happens?