I know what you are saying.
It updated when the wife was on the computer. Instead of getting me, she went ahead and rebooted the machine. THEN, since Mozilla updated, the firewall asked to allow it through. She hit no and didn't tell me about this until this morning :)
grrrrr....
Arrrrghh!! That's EXACTLY what happened to me. I was in the cellar doing some soldering and I got the bellow, "Honey. Can you look at something on SAL?" (SAL is the name of the PC she was on.)