code sniped for downloading images in twitter, running on developer console of web browser

twitter-image-downloader.js

const [, user] = location.pathname.split('/');

const wait = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

function extract(map, tweets) {
  const pares = Array.from(tweets).map(($tweet) => {
    const [$time] = $tweet.getElementsByTagName('time');
    if (!$time) return;
    const date = new Date($time.dateTime);
    const timestamp = date.toLocaleString().split('/').join('-');
    return Array.from($tweet.getElementsByTagName('img'))
        .filter(({ src }) => src.split('/').includes('media'))
        .map(({ src }, index) => [src, [user, timestamp, ++index].join('#')]);
  })
  .filter(item=>item)
  .flat(1);
  return new Map([...map, ...pares]);
}

async function save(url, filename) {
  const blob = await fetch(url).then(res => res.blob());
  const a = document.body.appendChild(document.createElement('a'));
  a.href = URL.createObjectURL(blob);
  a.download = filename;
  a.click();
  a.remove();
  URL.revokeObjectURL(a.href);
  delete a;
}

;(async function repeat(depth, que, done) {
  const bottom = document.body.scrollHeight;
  const step = document.body.offsetHeight;
  const next = depth + step / 2;

  if (next > bottom) {
    console.log(que);
    for (const [src, filename] of que) {
      if (done.has(src)) break;
      const url = new URL(src);
      url.searchParams.set('format', 'jpg');
      url.searchParams.set('name', 'large');
      await save(url, filename);
      done.add(src);
    }
  } else {
    const timeline = document.querySelector('h1[aria-level="1"]').nextElementSibling.firstChild.children
    const added = extract(que, timeline);
    window.scrollTo(0, next);
    await wait(500);
    repeat(next, added, done);
  }
})(0, new Map(), new Set());