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Firefox crashing and taking a long time to open

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After the new version, Firefox is taking over 5 minutes to open up and then when I quit at night, it takes several minutes to close and then a pop up message says Firefox has crashed. Do you want to quit or reopen Firefox? What is going on?????? Is this my problem or is a problem with the new version????????

After the new version, Firefox is taking over 5 minutes to open up and then when I quit at night, it takes several minutes to close and then a pop up message says Firefox has crashed. Do you want to quit or reopen Firefox? What is going on?????? Is this my problem or is a problem with the new version????????

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You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.