+
+#profiler-start {
+ list-style-image: url("chrome://browser/skin/devtools/profiler-stopwatch.png");
+ -moz-image-region: rect(0px,16px,16px,0px);
+}
+
+#profiler-start:hover {
+ -moz-image-region: rect(16px,16px,32px,0px);
+}
+
+#profiler-start[checked] {
+ -moz-image-region: rect(0px,32px,16px,16px);
+}
+
+#profiler-start[checked]:hover {
+ -moz-image-region: rect(16px,32px,32px,16px);
+}