Just Youtube Playback Speed Control

adding "dot+comma" button

Thank you for creating such a fantastic extension. I was wondering if it would be possible to add a "dot+comma" button as a shortcut option for changing the playback speed. I believe that having a "dot+comma" button, which is closer to the hand's position, would be more convenient and useful. And adding other keyboard buttons would be even more helpful>

Thank you very much for considering my suggestion