Unfortunately I'm not sure Mozilla has quite the right idea here. Take this principal:
Content Neutrality: Content blocking software should focus on addressing potential user needs (such as on performance, security, and privacy) instead of blocking specific types of content (such as advertising).
Adverts are a category of content I want to block for my "user needs". They are distracting and annoying, waste my bandwidth and I never interact with them anyway. They almost all violate my privacy with tracking, and are a security risk. They reduce performance at no benefit to me.
Mozilla seem like they are trying to create rules that will get sites on-board by being fair to them, but I think in reality unless advertisers are willing to take a massive hit in terms of the tracking, the type of ads they use and the performance hit they create it won't work.