like2fav

like2fav.js

function like2fav() {

  function style(selector) {
    return selector + '{ color: #ffac33 !important; }';
  }
  
  var s = document.createElement('style');
  s.innerText = style('.ProfileTweet-action--favorite.withHeartIcon .ProfileTweet-actionButton:hover');
  s.innerText += style('.favorited .ProfileTweet-action--favorite.withHeartIcon .ProfileTweet-actionButtonUndo');
  s.innerText += style('.ProfileTweet-action--favorite.withHeartIcon .ProfileTweet-actionCount:hover');
  document.head.appendChild(s);

  Array.from(document.querySelectorAll('.HeartAnimation'))
    .forEach((node) => (node.className = 'Icon Icon--favorite'));
}

Thanks for Array.from!