[1.8 & 1.7] Issue 4289:	Firefox 4/Firebug 1.7 can no longer debug Dojo After FF4.0+ window.eval() changed. Once FF5 comes out the stack frame will be available but the scope on that frame is "window". So we need to look to the callingFrame in that case.
[1.8 & 1.7] Issue 4289:	Firefox 4/Firebug 1.7 can no longer debug Dojo
After FF4.0+ window.eval() changed. Once FF5 comes out the stack frame will be available but the scope on that frame is "window". So we need to look to the callingFrame in that case.

http://code.google.com/p/fbug/source/detail?r=10625

firebug/tracing-console,firebug/tracing-console