It seems Emma already knows the keyboard shortcuts to operate the java console in Firefox. Here's a log of her first outing:
Logging set to : true ... completed.
Trace level set to 0: none ... completed.
Logging set to : false ... completed.
Reload proxy configuration ...
Done.
Dump classloader list ...
Done.
Reload proxy configuration ...
Done.
Dump thread list ...
Group main,ac=9,agc=1,pri=10
main,5,alive
Java2D Disposer,10,alive,daemon
AWT-Windows,6,alive,daemon
traceMsgQueueThread,5,alive,daemon
AWT-Shutdown,5,alive
AWT-EventQueue-0,6,alive
Group Plugin Thread Group,ac=3,agc=0,pri=10
AWT-EventQueue-1,6,alive
ConsoleWriterThread,6,alive,daemon
TimerQueue,5,alive,daemon
Done.
Quite the little debugger, ain't she? :)