Comment Re:'bout time! (Score 5, Informative) 86
Switching from on-board to usb audio on windows 7 reliably hangs flash for me.
However, you CAN do something about it! Find the right plugin-container.exe process (usually easy because it's the one taking hundreds of megabytes) and kill it. Firefox will now resume and give you the "your plugin has crashed" screen wherever flash was embedded previously.