Firefox not displaying XML file as a tree
I usually troubleshoot XML files by simply dragging them into a Firefox browser window. Unlike other text files, Firefox displays XML in a handy tree format, as show below.
Any syntax errors or typos in the XML result in a clear indication of where the problem is.
So I was surprised when an XML file refused to display as XML in Firefox. Instead, it showed up as the unhelpful run-together text below:
Disabling Firebug will bring back the XML tree display.