let counterMaxLength = options.campactMenuLengthPerLine;
        if (typeof counterMaxLength != 'number' ||
            3 > counterMaxLength || counterMaxLength > 10)
            counterMaxLength = 5;
        let counter = 0;
        let hBox;
        let itemCreateCampact = function(engine, last) {

// ==UserScript==
// @name           Scroll Search Engines
// @namespace      http://amb.vis.ne.jp/mozilla/
// @description    Change the selected search engine by scroll wheel on 'Search xxx for yyy' menu and do search by middle-clicking the menu.
// @include        main
// @compatibility  Firefox 2.0 3.0 3.1 3.2a1
// @author         Gomita
// @permalink      http://amb.vis.ne.jp/mozilla/?p=71
// @contributor    Alice0775, .
// @Note           http://space.geocities.yahoo.co.jp/gl/alice0775
// @version        2009/02/20 18:00 works without searchbar by alice0775
// @version        2009/02/18 21:00 works with full screen mode by alice0775
// ==/UserScript==
// @version        2007/10/21 03:50 compatibility with Fx3 and conqueryModoki2.uc.xul and performance improved by alice0775
// @version        2007.01.18
(function()
{
    const nsIBSS = Components.interfaces.nsIBrowserSearchService;
    const searchService =Components.classes["@mozilla.org/browser/search-service;1"]
                         .getService(nsIBSS);
    var timer,index;
    try{
      var searchBar = BrowserSearch.getSearchBar();
    }catch(e){
      var searchBar = BrowserSearch.searchBar;  //fx3
    }

    var mouseScrollHandler = function(event)
    {
        var engineName,flg;
        var engines = searchService.getVisibleEngines({ });
        // make sure that search bar is visible
        //if (!searchBar)
        //    return;
        event.stopPropagation();
        // Find the new index
        if(!index) index = engines.indexOf(searchService.currentEngine);
        // change search engine
        var i = index;
        if(event.detail > 0){
          do{
            i = i + 1;
            if(i >= engines.length) {
              i= index;
              break;
            }
            engineName = engines[i].name;
            flg = engineName.match(/-{2,}|\u2015{2,}/)
                  || (engineName.match(/^{/) && !engineName.match(/}/))
                  || (engineName.match(/}/)  && !engineName.match(/{/))
          }while(flg)
        }else{
          do{
            i = i - 1;
            if(i < 0 ) {
              i= index;
              break;
            }
            engineName = engines[i].name;
            flg = engineName.match(/-{2,}|\u2015{2,}/)
                  || (engineName.match(/^{/) && !engineName.match(/}/))
                  || (engineName.match(/}/)  && !engineName.match(/{/))
          }while(flg)
        }
        index = i;
        if(!gContextMenu){
          searchService.currentEngine = engines[i];  //指示されたエンジンにする
          return;
        }
        // update context menu label
        if(timer) clearTimeout(timer);
        engineName = engines[i].name;
        var label = gNavigatorBundle.getFormattedString("contextMenuSearchText", [engineName, getBrowserSelection(16)]);
        var menuitem = event.originalTarget;
        menuitem.engine = engines[i];
        menuitem.setAttribute("label", label);
        // update context menu icon
        timer = setTimeout(function(){
          searchService.currentEngine = engines[i];
          var iconURI = engines[i].iconURI;
          if (iconURI)
              menuitem.setAttribute("src", iconURI.spec);
          else
              menuitem.removeAttribute("src");
        },100);
    };

    if (searchBar) {
      // enable to change search engine by mouse-wheel on engine button
      document.getAnonymousElementByAttribute(searchBar, "anonid", "searchbar-engine-button")
          .addEventListener("DOMMouseScroll", mouseScrollHandler, false);
    }
    document.getElementById("cmd_CustomizeToolbars").addEventListener("DOMAttrModified", function(e) {
      if (e.attrName == "disabled" && !e.newValue){
        try{
          var searchBar = BrowserSearch.getSearchBar();
        }catch(e){
          var searchBar = BrowserSearch.searchBar;  //fx3
        }
        if(searchBar) document.getAnonymousElementByAttribute(searchBar, "anonid", "searchbar-engine-button").addEventListener("DOMMouseScroll", mouseScrollHandler, false);
      }
    }, false);
    var searchMenu = document.getElementById("context-searchselect");
    if(!searchMenu) return;
    // enables to change search engine by mouse-wheel on context menu
    searchMenu.addEventListener("DOMMouseScroll", mouseScrollHandler, false);
    // update context menu icon on showing popup
    document.getElementById("contentAreaContextMenu").addEventListener("popupshowing",function(aEvent)
    {
        var ss = Cc["@mozilla.org/browser/search-service;1"].
                 getService(Ci.nsIBrowserSearchService);
        if(aEvent.originalTarget != document.getElementById('contentAreaContextMenu')) return;
        if (!gContextMenu || !gContextMenu.isTextSelected)
            return;
        // update context menu icon
        var menuitem = document.getElementById("context-searchselect");
        var iconURI = ss.currentEngine.iconURI;
        if (iconURI)
            menuitem.setAttribute("src", iconURI.spec);
        else
            menuitem.removeAttribute("src");
    }, false);
    // enable to search by middle-click
    searchMenu.addEventListener("click", function(event)
    {
        if (event.button == 1)
        {
            searchMenu.loadSearch(getBrowserSelection(), true, searchMenu.engine);
            event.originalTarget.parentNode.hidePopup();
        }
    }, false);

    searchMenu.loadSearch = function(searchText, useNewTab, engine) {
      var ss = Cc["@mozilla.org/browser/search-service;1"].
               getService(Ci.nsIBrowserSearchService);
      if (typeof engine == "undefined"){
        // If the search bar is visible, use the current engine, otherwise, fall
        // back to the default engine.
        //if (isElementVisible(this.searchBar))
          engine = ss.currentEngine;
        //else
        //  engine = ss.defaultEngine;
      }
      var submission = engine.getSubmission(searchText, null); // HTML response

      // getSubmission can return null if the engine doesn't have a URL
      // with a text/html response type.  This is unlikely (since
      // SearchService._addEngineToStore() should fail for such an engine),
      // but let's be on the safe side.
      if (!submission)
        return;

      if (useNewTab) {
        gBrowser.loadOneTab(submission.uri.spec, null, null,
                            submission.postData, window.fullScreen?false:null, false);
      } else
        loadURI(submission.uri.spec, null, submission.postData, false);
    }
    searchMenu.setAttribute("oncommand", "this.loadSearch(getBrowserSelection(), true, this.engine);");
    // ready to show icon in search menu
    document.getElementById("context-searchselect").className = "menuitem-iconic";
}());

(async (contextMenu, searchSelect, searchService) => {

   var fullText = true;

   Services.search.isInitialized || await new Promise(
      resolve => Services.search.init(resolve)
   );
   searchSelect.collapsed = true; // удалить стандартный пункт меню для поиска

   // Создать новый пункт меню для поиска ....
   var menu = contextMenu.insertBefore(document.createElement('menu'), searchSelect);
   menu.setAttribute("class", "menu-iconic");
   addEventListener("popupshowing", (e)=> menu.hidden = searchSelect.hidden, false, contextMenu); 
      
   function setMenu() {  
      menu.engine = searchService.currentEngine;
      menu.setAttribute("label", "Искать в " + menu.engine.name + " или в ...");
      menu.setAttribute("image", menu.engine.iconURI.spec );
   };
   setMenu();

   
   // Создать подменю с поисковиками .... 
   var menuPopup = menu.appendChild(document.createElement("menupopup")); 
   menuPopup.setAttribute('style', 'overflow: scroll'); 

   function setItemsToMenuPopup(e) {
      menuPopup.textContent = "";      

      var engines = searchService.getVisibleEngines({})
         .filter(engine => engine != searchService.currentEngine);
      var hiddenList = Services.prefs.getStringPref("browser.search.hiddenOneOffs").split(",");
      engines.forEach((engine)=> { 
         if (hiddenList.includes(engine.name)) return;
         var mItem = document.createElement("menuitem");
         mItem.setAttribute("label", engine.name);
         mItem.setAttribute("class", "menuitem-iconic");
         mItem.setAttribute("src", engine.iconURI.spec);
         mItem.engine = engine;
         menuPopup.appendChild(mItem);
      })
   };  
   setItemsToMenuPopup();
   
   // установить действие для клика на меню и подменю
   menu.onmouseup = e => {
      var background = e.button != 0;
      var text = gContextMenuContentData.selectionInfo[fullText ? "fullText" : "text"];
      contextMenu.hidePopup();
      var submission = e.target.engine.getSubmission(text, null);
      gBrowser.loadOneTab(submission.uri.spec, null, null, submission.postData, background, false);
   }
      
   
   // Наблюдатель за изменениями в поисковиках пересоздаёт меню и подменю .... 
   var getEngineModified = {
      observe:(subject, topic, data)=> {
         if ( /changed|removed|current/.test(data) ) { setMenu(), setItemsToMenuPopup() };             
      }
   };
   Services.obs.addObserver(getEngineModified, "browser-search-engine-modified", false);   
   Services.prefs.addObserver("browser.search.hiddenOneOffs", setItemsToMenuPopup);
   
   
   // Удалять наблюдатели и меню, показать стандартный пункт ....
   addDestructor(()=> {
      menu.remove();            
      searchSelect.collapsed = false; 
      Services.obs.removeObserver(getEngineModified, "browser-search-engine-modified"); 
      Services.prefs.removeObserver("browser.search.hiddenOneOffs", setItemsToMenuPopup);
   });
      
})(document.getElementById("contentAreaContextMenu"), document.getElementById("context-searchselect"), Services.search);