[aldto]

It looks like you can also shorten "Back" to "b".

So far, I like this line-mode browser simulator much more than what is commonly available for the command line (lynx or links2). Does any one know of a modern implementation of it? (Where links are numbered instead of the user having to navigate around the document).

[d0mine]

There are browser extensions such as Vimium C that provide keyboard-based navigation.