// Добавить контекстное меню с поисковиками для кнопки ......................................
function searchService() {
     return Components.classes["@mozilla.org/browser/search-service;1"].getService(Components.interfaces.nsIBrowserSearchService);
}
_a = searchService();

this.selectEngine = function(aNode, aEvent) {
     var engine = aEvent.target.engine;
     var ss = searchService();
     ss.currentEngine = ss.getEngineByName(engine.name);
     aNode.engine = engine;
     aNode.image = aEvent.target.getAttribute("src");
}

this.populateMenu = function(aNode) {
     var ss = searchService();
     var engines = ss.getVisibleEngines({ });
     const kXULNS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";

//----------------------------------------------------------------------------------
//     while( aNode.firstChild && aNode.firstChild.localName != "menuseparator" ) {
       while( aNode.firstChild && aNode.firstChild != managerSeparator ) {
//----------------------------------------------------------------------------------
            aNode.removeChild( aNode.firstChild );
            }

     for ( var i = engines.length - 1; i >= 0; i--) {
           var mi = document.createElementNS(kXULNS, "menuitem");
           mi.id = "cb-search-" + engines[i].name;
           mi.className = "menuitem-iconic searchbar-engine-menuitem";
           mi.setAttribute("label", engines[i].name);
           if ( engines[i].iconURI )
                mi.setAttribute("src", engines[i].iconURI.spec);
                mi.engine = engines[i];
           if ( mi.engine == ss.currentEngine )
                mi.style.fontWeight = "bold";
                mi.setAttribute("onclick",  "event.preventDefault(); event.stopPropagation(); parentNode.parentNode.selectEngine(parentNode.parentNode, event)");
           aNode.insertBefore(mi, aNode.firstChild);
           }

//------------------------------------------------------------------------------

    var engines = gBrowser.mCurrentBrowser.engines;
    if (!(engines && engines.length)) return;

    var sep = document.createElement("menuseparator");
    sep.id = "cb-search-addengine-separator";
    aNode.insertBefore(sep, managerSeparator);

    for (var i = 0; i < engines.length; i++) {

        var engine = engines[i];

        var menuitem = document.createElement("menuitem");
        menuitem.setAttribute("id", "cb-search-addengine-engine-" + (i + 1));
        menuitem.setAttribute("class", "menuitem-iconic addengine-item");
        menuitem.setAttribute("tooltiptext", engine.uri);
        menuitem.setAttribute("uri", engine.uri);
        menuitem.setAttribute("title", engine.title);
        menuitem.setAttribute("label", "Добавить «" + engine.title + "»");
        if (engine.icon) menuitem.setAttribute("src", engine.icon);

        var command = '\
\
Cc["@mozilla.org/browser/search-service;1"]\
.getService(Ci.nsIBrowserSearchService)\
.addEngine(\
event.originalTarget.getAttribute("uri"), \
Ci.nsISearchEngine.DATA_XML, \
event.originalTarget.getAttribute("src"), \
true);'
        menuitem.setAttribute("oncommand", command);

        aNode.insertBefore(menuitem, managerSeparator);
    }
//------------------------------------------------------------------------------
    
}

this.currentEngine = searchService().currentEngine;
var ss = searchService();
this.engine = ss.currentEngine;
this.image = this.engine.iconURI.spec;

var mp = this.appendChild( document.createElement("menupopup") );
mp.setAttribute("onpopupshowing", "parentNode.populateMenu(this)");
mp.setAttribute("oncommand", "event.stopPropagation()");

var managerSeparator = mp.appendChild( document.createElement("menuseparator") );
managerSeparator.id = "cb-searchbutton-separator"
var managerItem = mp.appendChild( document.createElement("menuitem") );
managerItem.setAttribute("label", "Управление поисковыми системами…");
managerItem.setAttribute("oncommand", "openDialog('chrome://browser/content/search/engineManager.xul', " + "'engineManager', 'chrome, dialog=no')");
this.type = "menu-button";