Back in 2010, Adobe introduced Digital Pulse Debugger, a JS snippet that you could add to your Bookmark and act as your Sitecatalyst, Test & Target, AdLens and Audiomanager debugger. Effectively, an image requests that shows you via a basic interface all the variable and success events that fire once your page loads amongst other useful information such as Report Suite ID, Visitor ID etc.
Pulse became a must have extension, however it lacked the ability to show you a sequence of requests (you could do that with Charles), onclick events and variables that fire without a page load as well as possible errors with your variable settings within the admin console. For that you have to go via the network option in the development console or use 3rd party tools such as Observe point and Charles.