AFAIK, and what it looks like from Adblocks FAQ [1] they work by blocking particular addresses from serving content. I assume surveillance blockers do what you are describing and it sounds like a move away from ad blockers to surveillance blockers might make the web more usable and sustainable.<p>[1] <a href="https:&#x2F;&#x2F;adblockplus.org&#x2F;faq_internal" rel="nofollow">https:&#x2F;&#x2F;adblockplus.org&#x2F;faq_internal</a>