[matt_kantor]

> (just realized emacs bindings work in comments, nice, no ctrl-x tho)

Are you using macOS? If so, those keybindings work everywhere.

As far as I can tell, Hacker News doesn't impose any custom keybindings (the client-side scripting on this site[0] is very simple).

[0]: https://news.ycombinator.com/hn.js

[nine_k]

Emacs bindings also work on Linux in GTK apps, if you enable them:

  gsettings set org.gnome.desktop.interface gtk-key-theme "Emacs"

If you make Qt follow GTK settings, they also work in many Qt apps, too, but in a more limited way.