We have already posted about the exciting features of Firefox 10, which is scheduled to release on 31st January. With Firefox 10, the integrated developer tools in Firefox are getting enriched by the addition of Page Inspector and Style Inspector. These tools will continue to add more features in upcoming versions of the Firefox.
In the following video, you can see Page Inspector & Style Inspector in action:
Just to remind you, Firefox 11 will have 3D view of page inspector and live Style Editor.
Related: Firebug May Die Soon!