Proton Mail, a privacy-focused email provider, provided Swiss authorities with payment data that helped the FBI unmask an anonymous account affiliated with the Stop Cop City movement in Atlanta. The account was being investigated for connections to arson, vandalism, and doxing. Proton Mail's cooperation with authorities has raised concerns about the company's commitment to user privacy. The incident highlights the limitations of Proton Mail's end-to-end encryption and Swiss privacy law in protecting user data.