You should also be aware that many large companies have tools to see what you have surfed, and for how often you do so. If you can ssh out, just forward a port

You should also be aware that many large companies have tools to see what you have surfed, and for how often you do so. If you can ssh out, just forward a port to a Squid proxy on a machine at home or use one of the low cost VPS providers. Then setup your browser to use said proxy on the local port. You can forward ports on Windows using Putty, and of course you can use Linux/OS X to do this easily.