Strange problem. Opened FF 3.6.3 after a re-boot and my last opened tabs appeared but none of the page or menu elements would respond to a click. No error messages...just locked up. Started FF with a different profile and it works normally.
Next I used FEBE to restore a backup of my working profile and, after the restore, it's doing the same thing - locked out.
No newly installed plugins but since a brand new profile works while a restored one doesn't it kinda points to a problematic plug-in. Is there any way to start FF with all plugins disabled?