Click event doesn't fire for select, radio and checkbox

These form elements don't generate click and keypress event in editor.
It looks like the behavior is related to "-moz-user-input: none" rule
in EditorOverride.css. If I remove this line, the events will generate
fine. However, select will show the dropdown once clicked and radio/
checkbox will show their state, which is not desired for editor. My
question is how to prevent the dropdown/state from showing OR how to
keep the rule intact and still receive click and keypress events?

It looks like NVU was able to do it. I couldn't figure it out its
mechanism. Can anyone shed some light? Thanks a lot!