How the most popular Chrome extensions affect browser performance
<i>Most ad blockers work by blocking certain network requests that are initiated by the page. DDG Privacy Essentials reduces the number of network requests by 95% and the download weight by 80%.</i><p><i>DuckDuckGo Privacy Essentials reduces the CPU time of the article page from 31s to just 1.6s. All other tested extensions also bring CPU time down to at most 10s.</i><p>It seems the single most important thing regarding Real Word Performance is a good content blocking functionality (not to mention other boons). Why don't browsers come with one by default?