“What is a digital fingerprint? A digital fingerprint is essentially a list of characteristics that are unique to a single user, their browser, and their particular hardware setup. This includes information the browser needs to send to access websites, like the location of the website the user is requesting. But it also includes a host of seemingly insignificant data (like screen resolution and installed fonts) gathered by tracking scripts. Tracking sites can stitch all the small pieces together to form a unique picture, or “fingerprint,” of your device.” - coveryourtracks.eff.org/learn
you can also test your browser there to see what information you are exposing