Browser Javascript memory profiling tool

Mozilla released a Javascript memory profiling tool to help developers get a glimpse of what's under the hood of the browser. As web applications get more and more advanced and reside in the browser longer than normal webpages that we close often, the browser takes up a larger amount of memory that can get inexplicably big (Firefox dooh).
With the tool from mozilla we can inspect the Javascript heap and get info about our objects, functions and various components and fix leaks and other problems.

Here's a demo of the tool in action:

Quick look at the Memory Tool from Mozilla Labs from Dion Almaer on Vimeo.

This tool is composed of a

• Firefox Add-on including a memory server
• Memory Tool Web App

More info about the architecture of this tool can be found here.