You can customize Kodi to allow use keys (of keyboard keys, mouse/remote/joysticks buttons and more) as shortcut for the add-on functions.

In order to add your custom quick shortcuts you have to create or edit the Kodi keyboard.xml file, used to override the standard Kodi key mapping.

Kodi wiki provide all info and examples:

• https://kodi.wiki/view/HOW-TO:Modify_keymaps
• https://kodi.wiki/view/Keymap

This is a quick example of keyboard.xml content, to map the function Export to library to the G key:

<keymap>
  <global>
    <keyboard>
      <g>RunPlugin(plugin://plugin.video.netflix/keymaps/lib_export)</g>
    </keyboard>
  </global>
</keymap>

Only some of the add-on functions are available for mapping:

Add/Remove to My list
RunPlugin(plugin://plugin.video.netflix/keymaps/my_list)

Change watched status (locally)
Note: works only with "Sync of watched status with Netflix" enabled
RunPlugin(plugin://plugin.video.netflix/keymaps/change_watched_status)

Export/Update to library
RunPlugin(plugin://plugin.video.netflix/keymaps/lib_export)

Remove from library
RunPlugin(plugin://plugin.video.netflix/keymaps/lib_remove)

Please be careful! Do not hold down the keys for a long time may cause side effects!

This could cause unexpected behaviour of the add-on and/or in worst case scenario also corrupt the database.