Keyboard shortcut to format text as code in rich-text editor doesn't work in firefox

The shortcut for format text as code in the gitlab rich-text editor is ctrl-e, according to the documentation.

When I highlight some text and type ctrl-e I get sent to the firefox address bar, which is the default behaviour of both ctrl-e and ctrl-k in firefox, but this behaviour can be prevented with `event.preventDefault()`, as the editor widget presumably does for ctrl-k to insert a link (because that works), so idk what's up.