It looks like Firefox folder was deleted/moved. Try to search your harddrive for Firefox.exe in case it was moved.
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>Yes, it is still there. Is it under "Mozilla Firefox (1.0PR)".
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>When I click on it, it generates an error:
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>0 : Uninstall log folder not found:
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>HKEY_LOCAL_MACHINE\Software\Mozilla\Mozilla Firefox\1.0PR(en-US)\Uninstall\Uninstall Log Folder