It would be better for both sighted & blind users if tabs were used
rather than a list box for settings. As this allows the user to see all
tabs at a glance. It's harder to navigate to a listbox , particularly
if only the keyboard is being used, as the user has to tab back to find
the list box, and then click once to open it , find the desired item,
and select it. Compare this to just clicking on the desired tab with
the mouse or just control tab with the keyboard.