Viewport Dimension Overlay

webpage. the this feedback tool about the size the extension by instant developers unobtrusive an chrome web showing a window and semi-transparent viewport design dimension automatically a displaying for overlay that is it testing providing the corner, helps of appears with in responsive overlay resized. debugging. and elegant ratio viewport toggle click, layout a and is browser designers that simple real-time invaluable any window dimensions users an makes handy and can bottom-right current as updating clean, overlay aspect