I suspect Mozilla would penalize sites that track you, which is most sites, which would cause people to not use it and go back to Google when it wasn't showing

I suspect Mozilla would penalize sites that track you, which is most sites, which would cause people to not use it and go back to Google when it wasn't showing them what they expected. Mozilla is probably in the best position to do it, I'm just not sure they actually would do it in a way that appealed to consumers.