[Normille]

For Neovim users, see also Firenvim [0]. Which I've been using for quite a while now.

[0] https://github.com/glacambre/firenvim

[danieldevries]

The posted extension is about using vim key bindings to navigate links and other useful common commands. Firenvim is about embedding an nvim instance in an text input field. Apples and oranges.

[NoThisIsMe]

Worth noting glacambre (the Firenvim creator) is one of the primary Tridactyl contributors. And the two integrate too, IIRC.