While debugging an application/program in eclipse , go to the display screen in the side menu items with in the eclipse and type run time variables and execute the same like you would prefer to do in firebug, where you type commands and click on run.
Alternatively, to bring up the Display screen, you can go to
window->show view ->Display or Ctrl+Shift+D
I have simply heard about the same and have not tried it yet. So plz don’t blame me if it does not work for you.
Hope this works 0.0