If you keep refreshing, you can watch the numbers change. (If not, try disallowing cookies first; then Javascript second.)  This leads me to think that, since the numbers are shrinking slowly (12.5 bits... 12.1 bits... 11.8 bits...), it means that: of the full collection of data that your browser is sending, only __ bits actually makes you unique.  Meaning to say, some of the data is common to others, so isn't useful for distinguishing you from them.<p>Some formulae and explanation over here: <a href="https://www.eff.org/deeplinks/2010/01/primer-information-theory-and-privacy" rel="nofollow">https://www.eff.org/deeplinks/2010/01/primer-information-the...</a>