To expand upon my original question, I get that adding in functionality specific to each website is not ideal. But the technical cost here (removal of one DOM e

To expand upon my original question, I get that adding in functionality specific to each website is not ideal. But the technical cost here (removal of one DOM element from one website) seems to be drastically smaller than the payoff (not getting screwed over in terms of performance on one of the world's most popular websites). Am I seriously underestimating the eng cost of such a patch, or is there some unwritten rule that browsers aren't supposed to mess with the HTML that a page serves?