Google Is Testing Its Controversial New Ad Targeting Tech in Millions of Browsers. Here’s What We Know. | Electronic Frontier Foundation

Update, April 9, 2021 : We've launched Am I FLoCed, a new site that will tell you whether your Chrome browser has been turned into a guinea pig for Federated Learning of Cohorts or FLoC, Google’s latest targeted advertising experiment. Today, Google launched an “origin trial” of Federated Learn..