There's a huge barrier to entry if you start from scratch. You can fork an existing browser of course, but what would you change if you could so? It seems diff

There's a huge barrier to entry if you start from scratch. You can fork an existing browser of course, but what would you change if you could so? It seems difficult for a browser to differentiate itself these days, as the existing ones have had the time to build out fairly complete feature sets, and they can just copy each other if there is some big new idea.