@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
.bookmark-item[container][open],
#bookmarksToolbarFolderMenu[container][open] {
list-style-image: url("chrome://browser/skin/places/searching_16.png") !important;
-moz-image-region: rect(0px, 16px, 16px, 0px)!important;
opacity: 0.9 !important;
}