Please consider refraining from (or at least making optional) the sorting of the JSON property keys when using the JSON tree viewer. For code which sends out complex payloads, having the properties reordered makes it hard to compare the tree to the actual payload sent. For example, we send startXXX and endXXX properties at the end of our payload, and when Fiddler moves "endXXX" to the top of the tree, debugging becomes a pain. Please allow the payload to be tree-visualized as constructed.