+.devtools-option-toolbarbutton {
+ list-style-image: url("chrome://browser/skin/devtools/option-icon.png");
+ -moz-image-region: rect(0px 16px 16px 0px);
+ background: none;
+ border: none;
+}
+
+.devtools-option-toolbarbutton:hover,
+.devtools-option-toolbarbutton[open=true] {
+ -moz-image-region: rect(0px 32px 16px 16px);
+}
+