.fullscreenButton {
background-image: -moz-image-rect(url("chrome://global/skin/media/fullscreenButton@2x.png"), 0, 32, 32, 0);
background-size: 16px 16px;
.fullscreenButton {
background-image: -moz-image-rect(url("chrome://global/skin/media/fullscreenButton@2x.png"), 0, 32, 32, 0);
background-size: 16px 16px;