http://www.dailymail.co.uk/sciencete...ogged-out.html

Now I've really never concerned myself as to how the cookies file
(usually "cookies.txt" yes?) interacts with your web browser and web
servers (and you're welcome to explain this interaction) -

But if I read this story correctly, what exactly does Facebook's
web-server do in terms of reading or accessing your complete browsing
history that any other web-server can't do? Or doesn't do?

In other words - is this strictly just a facebook phenomena, and if so
why?