In Firefox, go to this address "about:config" and make sure this value is set to true:
network.proxy.socks_remote_dns = true
Note the dynamic forwarding port in Putty settings:
In Firefox, network Connection settings window, make sure "Manual Proxy" is selected and make sure that only the SOCKS fields are populated. All other proxy fields should be blank, and "0" for the ports. See example below:
The SOCKS proxy should have the Putty dynamic tunnel port number.
That's it. You can check your IP address before and after using the proxy at www.whatismyip.com
