amazon subscribe and save button!!

adds a subscribe and save button to the left of the returns & orders button in the same style as the rest of amazon
Ask a question, post a review, or report the script.
Wrap lines
// ==UserScript==
// @name         amazon subscribe and save button!!
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  adds a subscribe and save button to the left of the returns & orders button in the same style as the rest of amazon
// @author       Nicole_
// @match        https://www.amazon.com/*
// @icon         https://icons.duckduckgo.com/ip2/amazon.com.ico
// @license MIT
// @run-at       document-start
// ==/UserScript==
setTimeout(addbutton, 10)
setTimeout(addbutton, 20)
setTimeout(addbutton, 30)
setTimeout(addbutton, 40)
setTimeout(addbutton, 50)
setTimeout(addbutton, 100)
setTimeout(addbutton, 200)
document.addEventListener("DOMContentLoaded", function () {
    addbutton()
});
function addbutton(){
    let toprightbuttons = document.querySelector('.layoutToolbarPadding');
    if (toprightbuttons.innerHTML.includes("?ref_=nav_orders_first")){
        toprightbuttons.innerHTML = toprightbuttons.innerHTML.replace("/customer-preferences/edit?ie=UTF8&amp;preferencesReturnUrl=%2F&amp;ref_=topnav_lang", "/customer-preferences/edit").replace("https://www.amazon.com/gp/css/homepage.html?ref_=nav_youraccount_btn", "https://www.amazon.com/gp/css/homepage.html").replace('<a href="/gp/css/order-history?ref_=nav_orders_first" class="nav-a nav-a-2   nav-progressive-attribute" id="nav-orders" tabindex="0">\n  <span class="nav-line-1">Returns</span>\n  <span class="nav-line-2">&amp; Orders<span class="nav-icon nav-arrow"></span></span>\n</a>', '<a href="/gp/css/order-history" class="nav-a nav-a-2   nav-progressive-attribute" id="nav-orders" tabindex="0">\n  <span class="nav-line-1">Returns</span>\n  <span class="nav-line-2">&amp; Orders<span class="nav-icon nav-arrow"></span></span>\n</a><a href="/auto-deliveries/subscriptionList" class="nav-a nav-a-2   nav-progressive-attribute" id="nav-orders" tabindex="0">\n  <span class="nav-line-1">Subscribe</span>\n  <span class="nav-line-2">&amp; Save<span class="nav-icon nav-arrow"></span></span>\n</a>').replace('/gp/cart/view.html?ref_=nav_cart', '/gp/cart/view.html')
    }
};