Porting two existing titles is hardly what I would consider a new golden age.

Browser games peaked in the 00s-10s as the most accessible place to publish a simple indie project. It was simple and easy for beginner developers to just make something and put it out there, and for those that took off there was a decent pipeline to monetize a hit by licensing it to sites that would share a cut of ad revenue.

But now, mobile and Steam have replaced that as the go-to target for developers. They've gotten to a point where they're just as accessible to develop for, and if you want to make a living off your work you'll have a much better shot that way.

Plenty of great tools still exist for HTML5 development, if developers wanted to they could, and some do. Itch.io has a good amount of new browser games, they exist.

But there's never going to be anything as big as Newgrounds or Kongregate. Those days are gone for good.