If you like to surf non-work related sites at work and you dread being caught doing so, there is a Firefox plug-in that can help. It's called Panic, and it makes it so you can hit a single key and have Firefox revert to a work safe mode. It will close all of your open tabs, and open a new window with a URL you have given it... perhaps the company intranet or some other site you are supposed to be on for work. It's all configurable, and it really does work. With a single key stroke, you can make your browser safe for viewing by your boss or co-workers.