Interestingly the option has a link to an explanation on how it works. Which was handy as I couldn't get past the German cookie dialogue on the original article.

I guess the question is whether the aggregation services can be persuaded by clever attribute manipulation to give the ad site a near unique report for a user across many sites.

<https://support.mozilla.org/en-US/kb/privacy-preserving-attr...>

<https://datatracker.ietf.org/doc/html/draft-ietf-ppm-dap>

<https://github.com/mozilla/explainers/tree/main/ppa-experime...>