Cynical me saw Youtube in Chrome loading instantly while Firefox was served a build with the high parsing cost of Polymer polyfills. And starry-eyed developers

Cynical me saw Youtube in Chrome loading instantly while Firefox was served a build with the high parsing cost of Polymer polyfills. And starry-eyed developers importing if and for statements and writing imperative dom updates, while running some JS transpiler just like a React guy does. Never mind two major versions made Googling impossible, or debugging methods available to only geniuses.