Privacy watchdog files complaint over Firefox quietly enabling its Privacy Preserving Attribution

A European privacy watchdog (noyb) lodged a complaint with Austria’s DSB alleging Mozilla quietly enabled Privacy Preserving Attribution (PPA) in Firefox by default, shifting ad-measurement tracking to the browser; Mozilla defends PPA as aggregated and privacy-preserving with minimal costs. The article outlines user steps to disable PPA and notes broader industry context (Google’s Privacy Sandbox) and concerns that the change undermines user choice despite reducing reliance on third-party cookies.