imo, DNS is where it’s at. I use ahadns, sometimes adguard dns, but if you are more “obsessive”, “curious”, try nextdns. Only extension I use is Ublock Origin.
I thought so too, but maybe it’s just uncensored. I thought archive.org was alt-right even, but it’s just that anyone can post. Even 4chan isn’t actually alt-right. It is for us I think to improve the content of those platforms.
Best way to block ads is through DNS, I use ahadns. No need for an app, it’s just proper network settings.