What happened to the File, Edit, and View menus for mac 0s10.8.3? f10 and other solutions don't work?esn't work

I just got a new mac OS 10.8.3 and newest firefox. I can't find the menus bar, I can't close it without force quiting, can't even tell what version I have. Everytime I try to use the arrows to change the view as suggested full screen makes it worse. I have researched the subject and tried recommended fixes like F10, optionF, etc. and nothing is working. Please help?

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