TamperMonkey Use Readable Font from MEDIUM.COM

Readable-Font.user.js

// ==UserScript==
// @name         Readable_Font
// @namespace    http://yehg.net
// @version      0.1
// @author       yehg.net
// @description  TamperMonkey Use Readable Font from MEDIUM.COM
// @author       You
// @match        http://your-favourite-news-site/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

var cssId = 'readable_css';  // you could encode the css path itself to generate id..
if (!document.getElementById(cssId))
{
    var head  = document.getElementsByTagName('head')[0];
    var link  = document.createElement('link');
    link.id   = cssId;
    link.rel  = 'stylesheet';
    link.type = 'text/css';
    link.href = 'https://glyph.medium.com/css/e/sr/latin/e/ssr/latin/e/ssb/latin/m2.css';
    link.media = 'all';
    head.appendChild(link);


    var link1  = document.createElement('link');
    link1.rel  = 'stylesheet';
    link1.type = 'text/css';
    link1.href = 'https://cdn-static-1.medium.com/_/fp/css/main-branding-base.Wd2nhDzXq-LXOBFJaK5iAA.css';
    link1.media = 'all';
    head.appendChild(link1);



}

var s = document.createElement("style");
s.type = "text/css";
s.textContent = "* { color:black; font-size: 18px!important; font-family:  'medium-content-serif-font'!important; }";

document.head.appendChild(s);
})();