OpenBrowserWindow( "about:blank" ); }
OpenBrowserWindow();
void nsNativeAppSupportOS2::ActivateLastWindow() {    nsCOMPtr<nsIDOMWindowInternal> navWin;    GetMostRecentWindow( NS_LITERAL_STRING("navigator:browser").get(), getter_AddRefs( navWin ) );    if ( navWin ) {        // Activate that window.        activateWindow( navWin );    } else {        // Need to create a Navigator window, then.        OpenBrowserWindow( "about:blank" );    }}