// ==UserScript==// @name         Add FB Download Button// @namespace    http://tampermonkey.net/// @version      1.1// @description  Add a download button to dynamically change the URL to mbasic and open it in a new tab.// @author       You// @match        *://*.facebook.com/*// @grant        none// @license      MIT// ==/UserScript==(function () {'use strict';// Function to create and append the buttonfunction addDownloadButton() {const buttonId = "customDownloadButton";const buttonClasses = "x9f619 x1n2onr6 x1ja2u2z x78zum5 xdt5ytf x2lah0s x193iq5w x1xmf6yo x1e56ztr xzboxd6 x14l7nz5";const targetSelectors = [".xygnafs > div:nth-child(1) > div:nth-child(1)", // Original target element".xtp0wl1 > div:nth-child(2) > div:nth-child(2)" // New target element for video links];targetSelectors.forEach((selector) => {const targetElement = document.querySelector(selector);if (targetElement && !targetElement.querySelector(`#${buttonId}`)) {// Create a buttonconst button = document.createElement("button");button.id = buttonId;button.style.display = "flex";button.style.alignItems = "center";button.style.justifyContent = "center";button.style.border = "none";button.style.padding = "5px 5px";button.style.borderRadius = "100%";button.style.backgroundColor = "#663DA2";button.style.cursor = "pointer";button.style.position = "relative";button.style.marginLeft = "10px";button.style.width = "40px";button.style.height = "40px";// Add an SVG icon inside the buttonbutton.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" height="24" width="24" fill="#fff" viewBox="0 0 24 24"><path d="M5 20v-2h14v2H5Zm7-3-5-5 1.4-1.4 2.6 2.575V4h2v9.175L15.6 10.6 17 12l-5 5Z"/></svg>`;// Add click event to the buttonbutton.addEventListener("click", () => {const currentUrl = window.location.href;const modifiedUrl = currentUrl.replace("www.", "mbasic.");window.open(modifiedUrl, "_blank");});// Create a wrapper div for button with the desired classesconst div = document.createElement("div");div.style.display = "flex";div.style.alignItems = "center";div.classList.add(...buttonClasses.split(" "));div.appendChild(button);targetElement.appendChild(div);}});}// Observe for changes in the DOMconst observer = new MutationObserver(() => {addDownloadButton();});observer.observe(document.body, { childList: true, subtree: true });// Try to add the button immediately if the elements already existaddDownloadButton();})();