The blog post can be read as advocating self-censorship by Youtube. Or, more accurately, even more self-censorship by Youtube than they are already doing.
Where did you read that they recommend state censorship, i.e. speech restriction by law?
The impression the full article gives me is that its purpose is to raise awareness that the Youtube recommendation algorithm is manipulative.
When I read the title here on HN I thought it meant that Mozilla was demanding the US government force Youtube to scrap the recommendations feature entirely.