The Vivaldi browser takes a stand against Google’s new advertising tracking tech called “Federated Learning of Cohorts (FLoC)“:

At Vivaldi, we stand up for the privacy rights of our users. We do not approve of Google’s new FLoC technology. It creates privacy risks for users on the web.

The EFF does not mince its words either: Google’s FLoC Is a Terrible Idea.

Other privacy-oriented browser companies are already taking the same stand. Unfortunately, with Chrome’s browser market share of nearly 70% I really don’t know how much it will matter, as the vast majority of Chrome users are most likely blissfully unaware of the dangerous implications of this new and hidden tracking technology.

Source: No, Google! Vivaldi users will not get FloC’ed. | Vivaldi Browser