Check https://terrainformatica.com/2018/12/23/sciternode-versus-el... and discussion: https://news.ycombinator.com/item?id=18746408

In principle that is doable. Not sure about 100% compatibility as only WebKit (particular version) is 100% compatible with WebKit (particular version here). Edge is gone in that fight. Mozilla is standing but is not 100% compatible.