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Safari and Firefox both have a blacklist of known trackers in addition to cookie blocking. Not only that, these browsers also fight against other means of fingerprinting.

Safari does not have a blacklist of known trackers; it generates one dynamically based on tracker-like behavior it sees as you browse.

It feels telling that Firefox puts their Enhanced Tracking Protection settings pretty close to upfront as possible, and Chrome’s “Block Third Party Cookie” setting is for all intents and purposes to a non-technical user, both buried and off by default.

Even if it's true it's a huge difference. Very few people are going to a) think about this issue and b) know the right terms to google for a solution and/or c) dig around in their browser settings to find the setting.