FireFox - Aurora - 3d view
Just downloaded the latest firefox release “Aurora” ,from http://www.mozilla.org/en-US/firefox/aurora/
The browser looks really promising , at last they have “inspect element” built in now.
so probably now you don’t need firebug ( though i could not find script inspected in there )
One on the cool feature they have introduced is the 3d page view . see the below 3d view of facebook page.