Maybe you are familiar with the fact that a webserver can see which browser version you’re using and for example also how big the window is you’re using to view that website. In itself that is interesting enough for some statistics on the visitors of your website.
But there is more, way more and that is where thoughts of privacy, but also of marketing and research potential come in to play. The Electronic Frontier Foundation (EFF) has made a website to show a bit of what is possible. (Go support them here, by the way.)
