Chronology: when I was at Netscape and still (apart from part-time help) the only person working on JS and the DOM and the rest of the browser embedding, we too

Chronology: when I was at Netscape and still (apart from part-time help) the only person working on JS and the DOM and the rest of the browser embedding, we took JS to ECMA (now Ecma) in 1996. It was never brought to the W3C. The IE stagnation came later, after IE4 which was innovative (because Microsoft wanted to embrace/extend/extinguish Netscape and the Web). Almost everything we added to JS at Mozilla made its way into standards. Examples range from __proto__ to generators in ES6.