Stop Reddit from asking you to sign up

noRedditSIgnupPrompt.user.js

// ==UserScript==
// @name         Reddit Login Modal & Sidebar Remover
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Hides Reddit login/signup upsell modal and left sidebar, and restores page scrolling.
// @author       milotek.dev
// @match        https://*.reddit.com/*
// @grant        GM_addStyle
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    const css = `
        /* Hide Reddit login/signup modal */
        div#desktop-dynamic-upsell-dialog,
        [id="desktop-dynamic-upsell-dialog"],
        /* Hide left sidebar */
        #left-sidebar-container {
            display: none !important;
        }

        /* Restore scrolling on html and body */
        html, body {
            overflow: auto !important;
        }
    `;

    if (typeof GM_addStyle !== 'undefined') {
        GM_addStyle(css);
    } else {
        const style = document.createElement('style');
        style.type = 'text/css';
        style.appendChild(document.createTextNode(css));
        (document.head || document.documentElement).appendChild(style);
    }
})();