I don't think you'd need manifest V2 for such a rudimenty logic. The reason why ublock origin is so powerful is because it works with the DOM/not at the networ

I don't think you'd need manifest V2 for such a rudimenty logic. The reason why ublock origin is so powerful is because it works with the DOM/not at the network level and can use heuristics to determine wherever something is a advertisement or not.