Embed-bio.user.js

// ==UserScript==
// @name         Embed in bio
// @namespace    http://tampermonkey.net/
// @version      Noone cares about the version :P
// @description  Embed in bio
// @author       hjroh0315
// @match       *://*.stackexchange.com/users/*/*
// @match       *://stackoverflow.com/users/*/*
// @grant        none
// ==/UserScript==
//[if](data in iframe)[eif] changes to <iframe (data in iframe></iframe>
document.getElementsByClassName("bio")[0].innerHTML= document.getElementsByClassName("bio")[0].innerHTML.replace("<p>[if]","<iframe ");
document.getElementsByClassName("bio")[0].innerHTML= document.getElementsByClassName("bio")[0].innerHTML.replace("[eif]</p>","></iframe>");
/*(function() {
    'use strict';
    document.getElementsByClassName("bio")[0].innerHTML= document.getElementsByClassName("bio")[0].innerHTML.replace("<p>[f]","<iframe ");
    document.getElementsByClassName("bio")[0].innerHTML= document.getElementsByClassName("bio")[0].innerHTML.replace("[ef]</p>","></iframe>");
    // Your code here...
})();*/