When you load a web page, you will automatically broadcast certain information about your browser to the website you are visiting — as well as to any trackers embedded within the site (such as those that serve advertisements). 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.

If your browser is unique, then it’s possible that an online tracker can identify you even without setting tracking cookies. While the tracker won’t know your name, they could collect a deeply personal dossier of websites you visit.

It is called BROWSER FINGERPRINT..

“Browser fingerprinting” is a method of tracking web browsers by the configuration and settings information they make visible to websites, rather than traditional tracking methods such as IP addresses and unique cookies.

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