I need to create a frame in a toolbar in SDK. Reference to MDN:
The toolbar is positioned between the address bar and the content window. It occupies the whole width of the browser window and is 18 pixels high on a normal-resolution display or 36 pixels high on a high-resolution (HiDPI) display.
Can I change the height? I have a two-rows table to display. It only displays one. I could not find any way to change the height of the toolbar.