Much FUD
https://github.com/mozilla/explainers/tree/main/ppa-experiment explains how this works and I do not believe it falls afoul of GDPR et al as PPA does not track you, it tracks ads and whether they were viewed/clicked - not by whom.
> A site can register ad impressions, either when the ad is shown or when the ad is clicked, at their discretion.
Without a way to do this elsewhere, for example in the browser, Advertisers only way to measure ads is with the privacy-destroying, invasive tracking we're all desperate to escape from. With PPA, Advertisers can answer questions like "How many times was ad X seen?", "How many times was ad X clicked?" and little else.
Biting the hand that feeds IT
