+
+#instruments-pane-toggle {
+/* background: none;
+ box-shadow: none;
+ border: none; */
+ list-style-image: url("chrome://browser/skin/devtools/debugger-collapse.png");
+ -moz-image-region: rect(0px,16px,16px,0px);
+}
+
+#instruments-pane-toggle[pane-collapsed] {
+ list-style-image: url("chrome://browser/skin/devtools/debugger-expand.png");
+}
+
+#instruments-pane-toggle:hover,
+#instruments-pane-toggle:hover:active {
+ -moz-image-region: rect(0px,32px,16px,16px);
+}