Amlogic will not help you. Their main focus is Android and in Android you can use browsers. CoreELEC doesn’t interest them. But I already gave you an answer. It is not possible unless you find a Webbrowser that can use framebuffer directly.
But the problem is not Amlogic and not CoreELEC it is the browser. If you want brave you should ask them to implement this.
There is however a mediacenter addon or a proof of concept to make a brower work: