I tried to uninstall and reinstall Firefox several times. Whenever I try to open Firefox I get an error message saying "Close Firefox","a copy of Firefox is already open. Only one copy of Firefox can be open at a time. »

I uninstall Firefox, and then reinstall Firefox, try to open Firefox and get an error message in a box indicating popup.

"Closing of Firefox.

"A copy of Firefox is already open. Only one copy of Firefox can be open at a time. »

Create a new profile as a test to see if your profile is the source of the problems.

See "basic troubleshooting: a new profile:

If this new profile works then you can transfer files from the old profile to the new profile, but make sure not to copy corrupted files.

See:

Tags: Firefox

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