When you use a web browser to traverse the Internet, you may be surprised - even shocked - to see how much information is available at the other end. Go ahead and visit http://webkay.robinlinus.com/ to see for yourself.
The site also suggests was for you to avoid some of this "spilling the beans".
This is a demonstration of all the data your browser knows about you. All this data can be accessed by any website without asking you for any permission.
Kinda scary, huh?