Isn't there a way for adblock+ to insert just the right set of css rules based on the page it is inserted to? It's not like every site displays ads from every p

Isn't there a way for adblock+ to insert just the right set of css rules based on the page it is inserted to? It's not like every site displays ads from every possible ad network. I don't know the internals of AB+ so correct me if this is impossible for some reason.