Meta tracked users' mobile browsing on Android without consent, including visits to adult sites, while logged into Facebook and Instagram.
The data collected by Meta was used to serve personalized ads matching the users' recent interests.
Meta linked browsing history to Facebook and Instagram profiles without obtaining user consent, a practice considered abusive and a violation of security principles by Google.
Meta has stopped the tracking, but Google is already patching Chrome; regulators, especially in jurisdictions like the EU, may investigate Meta's behavior for privacy violations.