userscripts/RESser.user.js

// ==UserScript==
// @name        RESser
// @namespace   blankie-scripts
// @match       https://old.reddit.com/*
// @grant       GM_openInTab
// @version     1.4.1
// @author      blankie
// @inject-into content
// @run-at      document-start
// ==/UserScript==

document.addEventListener('keydown', function(e) {
    switch (e.keyCode) {
      case 86: // v
      case 78: // n
          // v/n to expose text spoilers
          document.querySelectorAll('.RES-keyNav-activeElement .md-spoiler-text:not(.revealed)').forEach((e) => {
              e.classList.add('revealed');
              e.click();
          });
          break;
      case 13: // return/enter
          // [shift-]enter on crossposted item to go to crossposted item instead of link
          const crosspostA = document.querySelector('.RES-keyNav-activeElement .crosspost-preview a');
          if (crosspostA !== null) {
              e.stopImmediatePropagation();
              if (e.shiftKey) {
                  // TODO fix duplicate link from res lmao
                  GM_openInTab(crosspostA.href, {active: true});
              } else {
                  location.href = crosspostA.href;
              }
              return;
          }
          // shift-enter on 'Continue this thread'
          if (e.shiftKey) {
              const continueThing = document.querySelector('.RES-keyNav-activeElement > span.deepthread > a');
              if (continueThing !== null) {
                  GM_openInTab(continueThing.href, {active: true});
              }
          }
    };
}, {capture: true, useCapture: true})