I just finished configuring firefox using tor to surf anonymous. It is badass! You are able to change between no proxy and proxy using tor. It makes you look like you are in a different location on the net. I had a friend check me out when logging in to a webserver and it shows that I was connected out of Germany. The bad part is that is does slow the connection down because of all the different hops it is doing, but worth it. http://tor.eff.org/index.html.en have fun!