Написал программу:
[code]
#include "test.h"
#include <QApplication>

# ifndef XP_WIN
    # define XP_WIN
# endif

#include "nsComponentManagerUtils.h"
#include "nsEmbedCID.h"
#include "nsIBaseWindow.h"
#include "nsIWeakReference.h"
#include "nsIWebBrowser.h"
#include "nsIWebNavigation.h"
#include "nsEmbedAPI.h"
#include "nsEmbedString.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    test w;

    w.show();

    nsCOMPtr<nsILocalFile> mreAppDir;
    nsresult  rv;

    char* path;
    path = "C:\\xulrunner-sdk-1.9.2\\bin";

    rv = NS_NewNativeLocalFile(nsEmbedCString(path), TRUE, getter_AddRefs(mreAppDir));
    if(NS_FAILED(rv)) return 1;

    rv = NS_InitEmbedding(mreAppDir, nsnull);
    if(NS_FAILED(rv)) return 1;
   
    // ----- 2
    nsCOMPtr<nsIWebBrowser> mWebBrowser = do_CreateInstance(NS_WEBBROWSER_CONTRACTID, &rv);
    if(NS_FAILED(rv)) return 1;

    // ---- 3
    nsCOMPtr<nsIBaseWindow>  baseWindow(do_QueryInterface(mWebBrowser, &rv));
    if(