Open Steam app in UncensorPat.ch

UncensorPatch.user.js

// ==UserScript==
// @name         Open In UncensorPat.ch
// @version      0.0.1
// @description  Adds a link to open Steam content in UncensorPat.ch.
// @author       Semidio
// @match        *://steamcommunity.com/app/*
// @match        *://store.steampowered.com/app/*
// @grant        none
// ==/UserScript==

function CreateButton(pageId) {
    var steamButton = document.createElement("a");
    var buttonText = document.createTextNode("UncensorPat.ch");
    steamButton.setAttribute("href", "https://www.uncensorpat.ch/game/" + pageId);
    steamButton.setAttribute("class", "menuitem");
    steamButton.appendChild(buttonText);

    var superNav = document.getElementsByClassName("supernav_container")[0];
    superNav.appendChild(steamButton);
}

// Thanks David Morales, https://stackoverflow.com/questions/11582512/how-to-get-url-parameters-with-javascript/11582513#11582513
function getURLParameter(name) {
    return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search)||[,""])[1].replace(/\+/g, '%20'))||null;
}

var pageId = "";var currentUrl = window.location.href;var urlParts = currentUrl.split("/");pageId = urlParts[4];CreateButton(pageId);