FLoC Block is a Chrome extension that aims to protect your privacy by preventing the FLoC (Federated Learning of Cohorts) ad-targeting code from divulging your "cohort id" to websites. FLoC is a new algorithm used by Google Chrome to group users into buckets based on their interests.

If you are using Chrome and want to avoid being tracked by FLoC, this extension provides a simple solution. It works by inserting a script on every page load that removes the FLoC API (document.interestCohort()), ensuring that any website attempting to call that function will encounter an error.

Overall, FLoC Block is a valuable tool for individuals concerned about their online privacy and seeking to prevent FLoC ad-targeting on Chrome.