To go with Windows tablet mode or any accessories Macbook users might use I think it would be nice if maybe there was like a button on the sidebar for tablet mode that makes the UI change to a more tablet friendly UI. Maybe start with the phone Opera GX UI and edit it to look good on a much bigger screen. Of course put a button somewhere to go back to the original UI. I know tablet mode isn't too popular (no comment about Mac because I don't know much about accessories' popularity) but it would be nice if you were willing to make it for those who do use tablet mode or Macbook accessories.