Charging for chrome extension

I'm a full time web-developer, and I use Chrome's Developer Tools on a daily basis. I have only ever touched Firebug a few times for debugging in Firefox.

For the times I have used Firebug however, I felt as though the functionality was much the same. I played around with a number of different areas and found everything to be as intuitive and functional as Chrome's Developer Tools; I did not feel lost or out of place. Also, I am aware of what both tools are supposed achieve, and I feel safe the following assessment.

I would say yes, Chrome Developer Tools are an adequate debug tool which are comparable to Firebug.

Well, I am not sure about which pattern you will call it. I would say following looks like Command pattern, I would do this..

var commands = {
         "addObject":function(request){/*Do something, send response etc*/},
         "getKeystroke":function(request){/*Do something, send response etc*/},
}

And in request handler

var requestHandler = function(request) {
      commands[request.command](request);
}