Steam Upvoter

Steam-Upvoter.user.js

// ==UserScript==
// @name         Steam Upvoter
// @version      2.1
// @description  Automatically upvote content on Steam Community Activity Feed
// @author       NVHT
// @match        https://steamcommunity.com/id/*/home*
// @icon         https://steamcommunity.com/favicon.ico
// @grant        none
// ==/UserScript==

(function () {
    'use strict';

    const $ = window.jQuery;
    if (!$) return;

    function voteUpAll() {
        $('.btn_grey_grey').each((_, btn) => {
            if (
                !btn.classList.contains('active') &&
                (btn.id.startsWith('vote_up_') ||
                 btn.id.startsWith('VoteUpBtn_'))
            ) {
                btn.click();
            }
        });
    }

    const originalScrollFn = window.Blotter_InfiniteScrollingCheckForMoreContent;
    if (typeof originalScrollFn === 'function') {
        window.Blotter_InfiniteScrollingCheckForMoreContent = function (...args) {
            originalScrollFn.apply(this, args);
            voteUpAll();
        };
    }

    voteUpAll();
})();