+
+button[type="disclosure"] {
+ border: 0px !important;
+ margin: 0px !important;
+ padding: 0px !important;
+ list-style-image: url("chrome://global/skin/tree/twisty-closed.gif");
+ min-width: 0px !important;
+ background-color: transparent;
+}
+
+button[type="disclosure"][open="true"] {
+ list-style-image: url("chrome://global/skin/tree/twisty-open.gif");
+}