JQuery AJAX exception only in Firefox: “Node cannot be inserted at the specified point in the hierarchy” (HierarchyRequestError)

Question

Very strange problem: I have a 2-part dropdown, where selecting a State will then add a second dropdown giving you a list of MSA Areas in that State.

This is done us

Answer 1

I had the very same issue, and it was only happening when the response was empty, for instance, I was expecting a table with records, but there was nothing to display.