Automatic scroll to bottom of page in twitter and facebook

autoscroll.user.js

// ==UserScript==
// @name         AutoScroll
// @namespace    https://gist.github.com/eykanal/a0b30e035d8c15995deeffec6ab21866
// @version      0.1
// @description  Automatically scroll to the bottom of the page
// @author       Eliezer Kanal
// @match        https://www.facebook.com/search/str/*
// @match        https://twitter.com/search*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var lastScrollHeight = 0;
    function autoScroll() {
        var sh = document.documentElement.scrollHeight;
        if (sh != lastScrollHeight) {
            lastScrollHeight = sh;
            document.documentElement.scrollTop = sh;
        }
    }
    window.setInterval(autoScroll, 100);
})();