Have you notice the new 3D view in Firefox?

Have you notice the new 3D view in Firefox?
This is a real cool feature. If you are a web designer as it specifically shows the level each attribute is applied. The image shows my app site on 3D view.
It also comes with panels similar to Google Chrome inspect element features built in.(Previously Firebug fill that gap) New design also supports live editing and dynamically changing css rules. But it is still lacking behind the power of the Firebug. But this 3D view is really an innovative feature and really love it.

How to access it? 
You need to download new Firefox 11.0 to get this feature. Download it from Firefox web site and write click anywhere on the site and click inspect element. From the right below panel select 3D now you can scroll and pan using the mouse and enjoy the page structure.