[atleta]

There are a lot of reasons why Firefox or other browsers can't do that, but my claim was that FF (or any browser) can't do it without writing code specifically to get around YT. And this was a response to the parent who said that FF should (and could) simply just ignore the CSS.

> Sure I can, uBlock Origin provides exactly that.

Obviously, I meant that it doesn't work financially so there is no point being upset about it. If enough people block the ads then they'll do something about it. Actually it's not hypothetical anymore, I just started to see these warnings a few days ago. (I wasn't deliberately blocking the ads, I've been just using ghostery which, it seems, started blocking YT ads.) So yeah, in the end, as you also say, people in general can't consume ad supported services without paying with their attention. It just doesn't work business wise.