AWS Management Console signed in account name label - Tampermonkey / Greasemonkey Userscript

aws-console-account-name-label.js

// ==UserScript==
// @name         AWS account name label in AWS Console
// @namespace    userscripts
// @version      0.2
// @description  Adds AWS account name label to navigation bar in AWS Console
// @author       kunz@ideadapt.net
// @match        https://*.console.aws.amazon.com/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    window.setTimeout(() => {
        const label = (unsafeWindow || window).ConsoleNavService.AccountInfo.loginDisplayNameAccount;
        const o = document.createElement("div");
        const color = {dev:'green',int:'brown',prd:'red'}[label.split('-').pop()]; // adjust to your account name schema
        o.innerHTML="<div style='position: absolute; top: 33px; right: 32px; background-color: "+color+"; color: white; z-index: 2000; font-family: sans-serif; padding: 5px;'>"+label+"</div>";
        const i = o.firstChild;
        document.body.appendChild(i);
    }, 5000);
})();

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