FLoC is designed to be opt-in, so uh...... no? Currently, for A/B testing, FLoC is automatically opting-in 0.5% of sites that serve ads, but that's only for a

FLoC is designed to be opt-in, so uh...... no? Currently, for A/B testing, FLoC is automatically opting-in 0.5% of sites that serve ads, but that's only for a small testing population, the idea is that FLoC history contribution will be opt-in exclusively. (There's a proposal that you have to contribute to FLoC history calculations to get access to a user's FLoC identifier)