var saveDocument = null;
document.addEventListener("DOMContentLoaded", OnDocument, true);
function OnDocument(event)
{
        // загруженный document => event. originalTarget
       saveDocument = event. originalTarget;
     ...
}

window.getBrowser().getBrowserIndexForDocument(event. target)

function OnDocument (event)
{
    var t = event. target;
    if (window. getBrowser (). getBrowserIndexForDocument (t) != -1)
    {
        // документ имеет "собственную" вкладку
        print ("tab");
    }
    else
    {
        // документ не имеет "собственную" вкладку
        // значит, это фрейм
        print ("frame in tab");
    }
}

function dnins (event)
{
    var t = event. originalTarget;
    if ((t. nodeName == "vbox") || (t. nodeName == "xul:vbox"))
    {
        // добавлена новая вкладка
        // прикрепляем элементу browser вкладки
        // обработчик DOMContentLoaded
        var b = t. getElementsByTagName ("browser") [0];
        b. addEventListener ("DOMContentLoaded", OnDocument, true);
    }
}

var tb = window. getBrowser ();
tb. addEventListener ("DOMNodeInserted", dnins, true);

function SavedDoc()
{
    this.Url;
//  List All Elem	
    this.listElem = new Array();
}

var listSavedDocument = new Array();

function OnDocument (event)
{
    try
	{
		SDoc = new SavedDoc;
	}
	catch (err) 
	{
		alert(err);
	}
    SDoc.Url = event.originalTarget.location.href;
//  номер таба
    var numSave= window.getBrowser().getBrowserIndexForDocument(event.originalTarget);
    if ((numSave >= 0) && (listSavedDocument.length < (numSave + 1)))
       listSavedDocument[numSave] = SDoc;
    var NumElem = 0;
//  numSave как его определить ?
    Fun2(event.originalTarget, numSave, NumElem);
}
function Fun2(elem, numSave, numNextElem)
{
    switch(elem.nodeName)
    {
		case 'FORM': numNextElem = GetDataForm(elem, numSave, numNextElem); break;
		case 'INPUT': numNextElem = GetDataInput(elem, numSave, numNextElem); break;
		case 'SELECT': numNextElem = GetDataSelect(elem, numSave, numNextElem); break;
    }
    for (var i=0;i<elem.childNodes.length;i++)
    {
         numNextElem = Fun2(elem.childNodes[i], numSave, numNextElem);	
    }
}

function GetDataForm(elem, numSave, numNextElem)
{
    listSavedDocument[numSave].listElem[numNextElem] = elem;
    return numNextElem;
}

function OnDocument (event)
{
    try
    {
        SDoc = new SavedDoc;
    }
    catch (err) 
    {
        alert (err);
    }
    SDoc. Url = event. originalTarget. location. href;
    var numSave= window. getBrowser (). getBrowserIndexForDocument (event. originalTarget);
    if ((numSave >= 0) && (listSavedDocument. length < (numSave + 1)))
        listSavedDocument[numSave] = new Array ();
    else
        numSave = event. currentTarget. mTab. tabIndex;
    listSavedDocument[numSave]. push (SDoc);
    var NumElem = 0;
    Fun2 (event. originalTarget, numSave, NumElem);
}

window.addEventListener("load", ext_onInit, false);
window.addEventListener("unload", ext_onDestroy, false);

function ext_onInit() 
{	
	try
	{
//		Test();
		document.addEventListener("DOMContentLoaded", OnDocument, true);
		document.addEventListener("DOMNodeRemoved", OnTabRemoved, true);
  	}
	catch (err) 
	{
		alert(err);
		return;
	}
}

var tb = window. getBrowser (); // tabbrowser
for (var i = 0; i < tb. mTabs. length; i++)
{
    t = tb. mTabs. item (i); // tab
    d = tb. getBrowserForTab (t); // document
    f = d. body. getElementsByTagName ('frame');
    for (j = 0; j < f. length; j++)
    {
        cf = f [i]; // frame
        ...

// Main
window.addEventListener("load", ext_onInit, false);
window.addEventListener("unload", ext_onDestroy, false);

function dnins (event)
{
    alert('In');
	alert(event. target.nodeName); // = tabbrowser
	alert(event. originalTarget.nodeName); // = tab
    var t = event. originalTarget;
//    if ((t. nodeName == "vbox") || (t. nodeName == "xul:vbox"))
    if ((t. nodeName == "tab") || (t. nodeName == "xul:vbox"))
    {
    	alert('Add');
 //        var b = t. getElementsByTagName ("browser") [0];
        t. addEventListener ("DOMContentLoaded", OnDocument, true);
    }
}

function ext_onInit() 
{	
	try
	{
	    var tb = window. getBrowser ();        
		tb. addEventListener ("DOMNodeInserted", dnins, true);
		
		document.addEventListener("DOMNodeRemoved", OnTabRemoved, true);
  	}
	catch (err) 
	{
		alert(err);
		return;
	}
}

function dnins (event)
{
	alert('In');
	alert(event. target.nodeName);
	alert(event. originalTarget.nodeName);
    var t = event. originalTarget;
//    if ((t. nodeName == "vbox") || (t. nodeName == "xul:vbox"))
    if ((t. nodeName == "tab") || (t. nodeName == "xul:vbox"))
    {
    	alert('Add');
        // äîáàâëåíà íîâàÿ âêëàäêà
        // ïðèêðåïëÿåì ýëåìåíòó browser âêëàäêè
        // îáðàáîò÷èê DOMContentLoaded
//        var b = t. getElementsByTagName ("browser") [0];
        t. addEventListener ("DOMContentLoaded", OnDocument, true);
    }
}

function ext_onInit() 
{	
	try
	{
//		Test();
		document.addEventListener("DOMContentLoaded", OnDocument, true);
//		var c = window.getBrowser().getBrowserAtIndex(0);
//		var c = document.getElementById ("content");
//		var tb = window. getBrowser ();
//		var b = document. getElementsByTagName ("browser") [0];
//        tb. addEventListener ("DOMContentLoaded", OnDocument, true);
        
//		tb. addEventListener ("DOMNodeInserted", dnins, true);
		
		document.addEventListener("DOMNodeRemoved", OnTabRemoved, true);
  	}
	catch (err) 
	{
		alert(err);
		return;
	}
}

var NumElem = window.getBrowser().getBrowserIndexForDocument(event. target);
	if (NumElem != -1)
	{
		SDoc.host = event. target. location. host;
		SDoc.url = '<url value="' + event. target. location. href + '"></url>';
		SDoc.url2 = event. target. location. href;
		listSavedDocument[NumElem] = new Array();
		listSavedDocument[NumElem].push(SDoc);
		ParseDocument(event. target, NumElem, 0, 0)
	}
	else
	{
//		alert(event. currentTarget. mTab. tabIndex);
//*		
		listSavedDocument[0][0].numFrame++;

		for (var i=0;i<listSavedDocument.length;i++)
		{
			if (listSavedDocument[i] != null)
			{
				var find = false;
				if (listSavedDocument[i][0].host == event. target. location. host)
				{
					for (var j=1;j<listSavedDocument[i].length;j++)
					{
						if (listSavedDocument[i][j].url == event. target. location. href)
						{
							find = true;
						}
					}
					if (find == false)
					{
						SDoc.host = event. target. location. host;
						SDoc.url = '<url value="' + event. target. location. href + '"></url>';
						SDoc.url2 = event. target. location. href;
						listSavedDocument[i].push(SDoc);
						ParseDocument(event. target, i, listSavedDocument[i].length - 1, 0)
						break;
					}
				}
			}
		}
//*/
	}

function dnins (event)
{
	alert('In');
	alert(event. originalTarget.nodeName);

function OnDocument (event)
{
    var t = event. target;
    if (window. getBrowser (). getBrowserIndexForDocument (t) != -1)
    {
        // документ имеет "собственную" вкладку
        print ("tab");
    }
    else
    {
        // документ не имеет "собственную" вкладку
        // значит, это фрейм
        print ("frame in tab");
    }
}

event. currentTarget. mTab. tabIndex

function dnins (event)
{
	alert('In');
//	alert(event. target.nodeName);
	alert(event. originalTarget.nodeName);
    var t = event. originalTarget;
//    if ((t. nodeName == "vbox") || (t. nodeName == "xul:vbox"))
    if ((t. nodeName == "tab") || (t. nodeName == "xul:vbox"))
    {
    	alert('Add');
        // äîáàâëåíà íîâàÿ âêëàäêà
        // ïðèêðåïëÿåì ýëåìåíòó browser âêëàäêè
        // îáðàáîò÷èê DOMContentLoaded
//        var b = t. getElementsByTagName ("browser") [0];
//        t. addEventListener ("DOMContentLoaded", OnDocument, true);
    }
}

<method name="getBrowserIndexForDocument">
        <parameter name="aDocument"/>
        <body>
          <![CDATA[
            for (var i = 0; i < this.mPanelContainer.childNodes.length; i++) {
              if (this.getBrowserAtIndex(i).contentDocument == aDocument) {
                return i;
              }
            }
            return -1;
          ]]>
        </body>
      </method>

<method name="getBrowserIndexForDocument">
        <parameter name="aDocument"/>
        <body>
          <![CDATA[
            for (var i = 0; i < this.mPanelContainer.childNodes.length; i++) {
              if (this.getBrowserAtIndex(i).contentDocument == aDocument) {
                return i;
              }
            }
            return -1;
          ]]>
        </body>
      </method>

if (event. originalTarget. location. href == event. currentTarget. contentDocument. location. href)
{
    // основной документ
}
else
{
    // фрейм
}

document.addEventListener("DOMContentLoaded", Docc1, true);
function Docc1(event)
{
	alert(event. currentTarget.nodeName); // == #document
}

window. getBrowser (). addEventListener ("DOMNodeInserted", dnins, true);
document.addEventListener("DOMNodeRemoved", OnTabRemoved, true);
function dnins (event)
{
    alert(event. currentTarget.nodeName); 
}

var c = document.getElementById ("content");
	for (var i=0;i<c.browsers.length;i++)
	{		
		if (c.browsers[i] == event. currentTarget. nodeName)
		{
			// где i номер таба
		}
	}

function OnDocument (event)
{
    alert ("currentTarget: " + event. currentTarget. nodeName); // всегда browser
    alert ("target: " + event. target);
}

function dnins (event)
{
    var t = event. originalTarget;
    if ((t. nodeName == "vbox") || (t. nodeName == "xul:vbox"))
    {
        var b = t. getElementsByTagName ("browser") [0];
        b. addEventListener ("DOMContentLoaded", OnDocument, true);
    }
}

var tb = window. getBrowser ();
tb. addEventListener ("DOMNodeInserted", dnins, true);