If you are a public phobic user, maybe you have already adopted a whole series of tools and reflexes in order to avoid advertising trackers , those programs that seek to know who you are and what you are doing on Internet. So you only use the private browsing mode, you have checked the box that automatically rejects third-party cookies, you have installed an extension that blocks the most common cookies, you use different browsers for different tasks, etc. .
The code will then generate a fingerprint that will have the advantage of not depending on the browser, but only the characteristics of the machine. Result: even if the user opens another browser, it will still be identified as the same user. That is why researchers call this the cross-browser fingerprinting . And it works almost every time. The study shows that the success rate of this identification is 99.24%. You can test this evil code yourself by visiting uniquemachine.org .