Firebug, the massively successful Firefox addon is an awesome development tool, but it’s not perfect. Carelessness in using it can lead to irritating and even embarrasing errors. And the console built into Internet Explorer 8? It’s great that web developers finally have something to help us develop on IE, but it is still pretty lame. When you consider working with both of them both together, you have even more problems. In general, it’s very undesirable to have debugging code cause bugs. Fortunately, there’s a very simple way of virtually eliminating these debugging errors.