pjs/layout/reftests/box-shadow/boxshadow-inner-basic-ref.html

<div style="background-color: grey; width: 300px; height: 300px; -moz-border-radius: 5px; position: absolute; top: 20px; left: 20px;">inset</div><div style="-moz-border-radius: 5px; width: 300px; height: 300px; background-color: white; position: absolute; top: 40px; left: 40px;">&nbsp;</div>