Firefox suddenly won't open at all

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.

See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox

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    In ordinary circumstances Firefox only runs one instance using one profile. If you have Firefox not shutting down properly that may prevent you from starting Fifrefox until you have found and killed the process. (Also look for plugincontainer which may also exist).
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    *[[Troubleshoot Firefox issues using Safe Mode]]
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    System Name xxxxx
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    System Model System Product Name
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    Total Physical Memory 15.9 GB
    Available Physical Memory 11.8 GB
    Total Virtual Memory 31.9 GB
    Available Virtual Memory 27.6 GB
    Page File Space 15.9 GB
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