@za sve This website (klix.ba) attempted to extract HTML5 canvas image data, which may be used to uniquely identify your computer. http://en.wikipedia.org/wiki/Canvas_fingerprinting Canvas fingerprinting is one of a number of browser fingerprinting techniques of tracking online users that allow websites to uniquely identify and track visitors using HTML5 canvas element instead of browser cookies or other similar means. The technique received wide media coverage in 2014[1][2][3][4] after researchers from Princeton University and KU Leuven University described it in their paper The Web never forgets.[5] Canvas fingerprinting works by exploiting the HTML5 canvas element. When a user visits a website with canvas fingerprinting, their browser is instructed to "draw" a hidden line of text or 3D graphic that is then converted to a digital token....