Viewport Dimension Overlay

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