[hyperdimension]

I think they mean needing deep pockets to write a new browser, with all the complexity that modern HTML+JS entails.

[projektfu]

The good news is that Firefox and chromium have pretty open licenses so you only need to change what you want. Of course you need to grok it, which isn't trivial. But writing a browser hasn't been easy since... Cello?

[ric2b]

Forking an existing browser ins't exactly writing a new browser, it's modifying one. That process very likely limits innovation in the space.