To add to the excellent answer from Gorhill, you might find this read interesting: https://0x65.dev/blog/2019-12-20/not-all-adblockers-are-born-equal.html https

To add to the excellent answer from Gorhill, you might find this read interesting: https://0x65.dev/blog/2019-12-20/not-all-adblockers-are-born-equal.html https://0x65.dev/blog/2019-12-20/not-all-adblockers-are-born... It is a deep dive into how modern content blockers work and what kind of rules they have to enforce (they are usually much more complex than simple domains, though). As a side node, I recently ran a small experiment and found out that around 90% or blocking from Easylist/EasyPrivacy/uBO lists can be done based on domain information only. But of course this leaves a lot of corner cases where sites might break or ads might still show, and ultimately more granularity is needed to address these cases.