Apr 20, 2021 4:00 AM PT DuckDuckGo has announced an add-on to the Chrome browser that blocks Google's new scheme to provide marketers with information for targeting advertising at Internet users. The scheme called FLoC -- Federated Learning of Cohorts -- is being tested in Chrome, in some cases without the knowledge of the browser's users. "If you're a Google Chrome user, you might be surprised to learn that you could have been entered automatically into Google's new tracking method called Federated Learning of Cohorts (FLoC)," DuckDuckGo explained in a post on its website. "It groups you based on your interests and demographics, derived from your browsing history, to enable creepy advertising and other content targeting without third-party cookies," it continued.