Posted 08 March 2009 - 04:48 PM
I've always wondered this, when on a P.C with a webcam installed on the monitor/laptop.
I guess it is possible if somebody takes over your computer, but then again you mention an up to date firewall, av and browser.
Regarding websites, I have previously been on sites which access your webcam to take a picture, I had to do it once when applying for this card which had to have your picture on.
But nowadays with Firewalls, and increased browser security i'm sure you would get some warning before the webcam was accessed.