While it's indeed used for "ad tracking", this snippet is actually closer to a white-hat tool. This is from Integral Ad Science https://integralads.com/ https

While it's indeed used for "ad tracking", this snippet is actually closer to a white-hat tool. This is from Integral Ad Science https://integralads.com/ https://integralads.com/ which attempts to detect ad fraud. If you hate ads, it won't matter, but in the fight to make ads less invasive, potentially more useful, and still viable as an economic model for those who want to participate with it, Integral and WhiteOps (https://www.whiteops.com/ https://www.whiteops.com/) both do some great data work to try to stop disruptive bots. If one hates all ads and tracking, of course, then none of this will matter, but just thought I'd point out the "why" for the fingerprinting in this case.