I think it's a nice first step in running web browsers from the keyboard. Well, beyond built-in functionality.
You push 'f' to get link hints, if there's few they'll be things like 'a', 'c', 'j', 'l', if many it'll build up algorithmically, most I've seen is triples, like 'ade'. You push those keys and it opens the linked page. 'H' to go backwards, 'd' and 'u' to scroll down and up, 'yf' and then a link hint to copy a link URL, 'x' to close a page and 'X' to open the last closed, and so on.
Some people want more, like vim motions in input fields and so on, so they opt for more complex tools.
