.local/share/jupyter/nbextensions/select_keymap/README.md

Select CodeMirror Keymap

This extension lets you choose between the available CodeMirror keymaps: default, emacs, vim, and sublime.

There's a chance that this might cause key conflicts, especially with other extensions.

Most browsers consume some of the global keybindings like Ctrl+n. The Menu Wizard add-on for Firefox allows you to disable some of the global key shortcuts, thus passing the keys through to CodeMirror.

Based on:

• jupyter-emacskeys
• notebook_input_mode