Still beware! Not filtering is not the same as allowing. If you signed a employment agreement or rules of conduct, then they can just keep track of what sites you visit (even down to what keys & clicks you use) to keep in a file for one day when the employer wants to have a "negotiation" with you. If the sites you visit go against your contract then you may be putting yourself in a position.

Not trying to be a pessimist just trying to keep it real, and maybe help you keep out of hot water.