DOM Snitch is intended for use by developers, testers, and security researchers alike. Developers can observe DOM modifications as they happen inside the browser without the need to step through JavaScript code with a debugger or pause the execution of their application. With built-in security heuristics and nested views, both advanced and less experienced developers and testers can quickly spot areas of the application being tested that need more attention. Enables developers to easily export and share captured DOM modifications while troubleshooting an issue with peers.”]
Source: https://security.googleblog.com/2011/06/introducing-dom-snitch-our-passive-in.html