Online privacy test http://StayInvisible.com/ to analyze what does your browser reveal to websites, in addition to your IP address. Allows to check your default Internet connection and connections protected with "hide my IP" services like proxy or VPN - often with shocking results. Modern web browsers provide a user with a lot of features but they have also been designed to reveal your IP address and tons of other "innocent looking" information to websites. A collection of such information can be used to compile browser fingerprints that according to the EFF study are unique, identifiable and can be easily used for online tracking. Hope will be usefull.