Ad-blocking, etc, are too important to me personally to delegate to just an extension, hence I use NextDNS, but naturally it can’t manipulate the DOM to tidy up the page.
Luckily I have long-preferred Firefox but I recognize that it’s not for everyone, or hardly anyone for that matter.
What do you mean by "just an extension"? It does the job very, very well. NextDNS is great, but especially with embedded ads you get a lot of 404s, which the extension can remove without any trace.
You pulled three words completely out of context and misrepresented them. But to be clear, and put another way, (ad) filtering is too important to be left to an extension alone, especially as browsers can no longer be relied upon, and creating layers of filtering like defence in depth is better to avoid single points of failure.
Luckily I have long-preferred Firefox but I recognize that it’s not for everyone, or hardly anyone for that matter.
Maybe a local pi-hole would do the job properly.