FCKEditor RC3 Mozilla Image/File Browsing

I don't know if this will help but I tried to add some code to make the script that seems to be having issues (/filemanager/browser/default/connectors/js/fckxml.js) more verbose.

Here is my javascript console output:
Error: [Exception... "'Permission denied to create wrapper for object of class UnnamedClass' when calling method: [nsIOnReadystatechangeHandler::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]

The code I added/changed:

FCKXml.prototype.LoadUrl = function( urlToCall, asyncFunctionPointer )
{
var oFCKXml = this ;

var bAsync = ( typeof(asyncFunctionPointer) == 'function' ) ;

var oXmlHttp = this.GetHttpRequest() ;

oXmlHttp.open( "GET", urlToCall, bAsync ) ;

if ( bAsync )
{
oXmlHttp.onreadystatechange = function()
{
if ( oXmlHttp.readyState == 4 )
{
oFCKXml.DOMDocument = oXmlHttp.responseXML ;
if ( oXmlHttp.status == 200 )
{
asyncFunctionPointer( oFCKXml ) ;
}
else
{
// Added for verbose testing
var vMSG = "\n\n";
var Prop;
for (Prop in oXmlHttp) {
vMSG += "Name: " + Prop + "Value: " + oXmlHttp[Prop] + "\n";
}
//alert( 'XML request error: ' + oXmlHttp.statusText + ' (' + oXmlHttp.status + ')' ) ;
alert(vMSG) ;
}
}
}
}

oXmlHttp.send( null ) ;

if ( ! bAsync )
{
if ( oXmlHttp.status == 200 )
{
this.DOMDocument = oXmlHttp.responseXML ;
}
else
{
// Added for verbose testing
var vMSG = "\n\n";
for (var Prop in oXmlHttp) {
vMSG += "Name: " + Prop + "Value: " + oXmlHttp[Prop] + "\n";
}
//alert( 'XML request error: ' + oXmlHttp.statusText + ' (' + oXmlHttp.status + ')' ) ;
alert(vMSG) ;
}
}
}