RedirectMobilePages.user.js

// ==UserScript==
// @name         Redirect Mobile Pages
// @description  Redirects mobile pages to the desktop version
// @version      1.0.6
// @author       heavyLobster2
// @namespace    github.com/heavyLobster2
// @downloadURL  https://gist.github.com/heavyLobster2/cc3ee6205e96c3f9c76c/raw/RedirectMobilePages.user.js
// @include      *://*.m.wikipedia.org/*
// @include      *://m.reddit.com/*
// @run-at       document-start
// @grant        none
// ==/UserScript==
(function () {
    "use strict";
    
    var oldUrl = window.location.href;
    var newUrl = null;
    
    var hostname = (new URL(oldUrl)).hostname;
    
    if (hostname.includes(".m.wikipedia.org")) {
        newUrl = oldUrl.replace(".m.wikipedia.org", ".wikipedia.org");
    } else if (hostname === "m.reddit.com") {
        newUrl = oldUrl.replace("m.reddit.com", "www.reddit.com");
    }
    
    if (newUrl !== null) {
        window.location.replace(newUrl);
    }
})();