speaking as a web dev who's obsessed with payload size, TTFB and web app performance, i find your statement to be patently false. i have well-written code that

speaking as a web dev who's obsessed with payload size, TTFB and web app performance, i find your statement to be patently false. i have well-written code that runs very fast in FF, and it always runs even faster in Chrome. not just JS, but also repaint and layout. FF does handle some absurd cases better: giant dom trees & scrolling, RAM usage, lazy tabs. as a long-time Firefox bug hunter and nightly user, i hope Firefox/Quantum & Servo can reverse this pattern, for sure.