.theme-tooltip-panel .panel-arrow[side="top"],
.theme-tooltip-panel .panel-arrow[side="bottom"] {
list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-vertical-dark@2x.png");
.theme-tooltip-panel .panel-arrow[side="top"],
.theme-tooltip-panel .panel-arrow[side="bottom"] {
list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-vertical-dark@2x.png");