Firefox suddenly won't start. I open it on my Mac, I see the Apple icon and Firefox where a menu bar should be, but that's it. My only option is to Force Quit. Firefox windows won't open at all. Any advice?

As you can read above, that's it. The only thing I can think of is that I did a Microsoft update and then my Firefox stopped working. It won't start up. Windows and tabs won't open. It's completely unresponsive. I have uninstalled and reinstalled new and old Firefox, yet I have the same problem.

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

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