… Eliminating these cookies is a major privacy boost for the internet, and Google pledged its so-called "privacy sandbox" would not feature any similar technology . FLoC is Google's alternative to cookies, which groups users into "cohorts" rather than revealing individual activities. …
… This system requires Google Play Services version 25.41.30 or higher. But this automatically blocks ROMs that are advertised as privacy-focused—like GrapheneOS, LineageOS, and CalyxOS—from accessing sites protected by reCAPTCHA. …
… Alternatives: This gets a bit confusing. GnuPG is itself an alternative to OpenPGP, which is based on PGP. Applications that use OpenPGP should be cross-compatible with each other. Be advised that email encryption, like most other forms of privacy protection, is far from perfectly secure. …