Inspecting firefox with firebug

Using ColorZilla I found an interesting feature. If I pick a color from firefox (bars,tabs or anything else of the browser) and then go to:

ColorZilla > Inspect Last Element > In Firebug

Then I can see the markup,css,js that firefox uses in the firebug panel just like a website. enter image description here

Is there any solution to view this code without use Colorzilla?

Solution

It sounds like you're after Chromebug.

Chromebug is the Firebug code adapted for XUL applications. It is the debugger that Firebug developers use to develop Firebug.

So you can debug your debugger, you know?