Or... you can do what I do and what I've gotten all my co-worker friends to do... position your computer so no one can see it directly. You can switch it to the other side and angle it so anyone coming in from the doorway can't see it immediately, giving you time to switch tabs lol. i know - how terrible. I always worry the IT guy can do a history of how much time I spend doing non-work related things, but sometimes my workload just lulls.
