Like a Twitter thread

like_thread.js

(function()
{
  const selector = `
    .tweet.ancestor,
    .tweet.js-original-tweet,
    .ThreadedConversation--selfThread .tweet.descendant
  `;
  for (let tweet of document.querySelectorAll(selector))
  {
    if (!tweet.classList.contains("favorited"))
      tweet.querySelector(".ProfileTweet-actionButton.js-actionFavorite").click();
  }
})();