 Issue 228:  	 inspect button deselects if scroll bar clicked;  look for xul:thumb under the mouse and stay in inspect for that case.
 Issue 228:  	 inspect button deselects if scroll bar clicked;
 look for xul:thumb under the mouse and stay in inspect for that case.

http://code.google.com/p/fbug/source/detail?r=6839

firebug/tracing-console,firebug/tracing-console