Firefox

scrutinize the protocol beforehand.

Sorry but that buys into the data miners' self serving myths. It implies the protocol is ok unless some failure makes it leak more information than was intended. In fact it's invasive even if it works exactly as hoped. "Tracking" is a misnomer too. It's hostile surveillance even if it's at population level. (Any nonconsensual surveillance that produces info to be used by people you don't like is hostile by definition. And it's near guaranteed that some of the buyers-advertisers, political campaigns and funders, govt agencies, whatever-will be people you don't like). So shut it down.