That's not the nicest way to ask for additional information, but see:

https://panopticlick.eff.org/about#browser-fingerprinting

> The site you are visiting may choose to analyze your browser using JavaScript, Flash and other methods (just like Panopticlick does). It may look for what types of fonts you have installed, the language you’ve set, the add-ons you’ve installed, and other factors. The site may then create a type of profile of you, tied to this pattern of characteristics associated with your browser, rather than tied to a specific tracking cookie.