+First make sure your Mozilla distribution contains the Negotiateauth component
+(libnegotiateauth.so on Unix, negotiateauth.dll on Windows). Generally this is
+included in versions 1.7beta and later on Unix platforms including Mac OSX, maybe
+1.8 and later on Windows.)
+
+The web server must be listed in preference network.negotiate-auth.trusted-uris.
+Easiest way to do this is to type about:config in the URL bar and change the setting
+on the resulting settings list. If this preference is not on the list, it probably
+means that your version of Mozilla does not support Negotiate auth.
+