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Firefox suddenly won't open at all

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Starting yesterday, firefox doesn't open at all. When I bring up the task manager it shows that firefox is running. I've tried ending the process and then restarting, but it still doesn't open. I tried uninstalling and reinstalling. I also tried to create a new profile as one your articles suggested but it won't even open the profile manager.

Starting yesterday, firefox doesn't open at all. When I bring up the task manager it shows that firefox is running. I've tried ending the process and then restarting, but it still doesn't open. I tried uninstalling and reinstalling. I also tried to create a new profile as one your articles suggested but it won't even open the profile manager.