#toggle-panes {
list-style-image: url("chrome://browser/skin/devtools/debugger-expand.png");
-moz-image-region: rect(0px, 16px, 16px, 0px);
#toggle-panes {
list-style-image: url("chrome://browser/skin/devtools/debugger-expand.png");
-moz-image-region: rect(0px, 16px, 16px, 0px);