良ければ修正箇所を教えて下さい。自分にとっては無いとすごく不便です
// ==UserScript==
// @name searchbutton.uc.js
// @include main
// @charset utf-8
// ==/UserScript==
var ucjs_searchButton = {
buttonName: [
"検索エンジン1",
"検索エンジン2",

],
init: function() {
var searchbar = document.getElementById("searchbar");
if (!searchbar) return;

Services.search.init().then(async (rv) => {
if (Components.isSuccessCode(rv)) {
for (let name of this.buttonName) {
var engine = Services.search.getEngineByName(name);
if(!engine) break;