twitterUnliker.js

const selector = '.favorited .ProfileTweet-action--favorite .ProfileTweet-actionButtonUndo'

const generateClickPromise = (el, index) => {
  return new Promise((resolve) => {
    setTimeout(() => {
      el.click()
      resolve()
    }, index * 200 + 200 * Math.random())
  })
}

function unlikeAll() {
  const heartElements = Array.from(document.querySelectorAll(selector))
  const allHeartsClicked = new Promise.all(heartElements.map(generateClickPromise))

  allHeartsClicked.then(() => {
    document.querySelector('.stream-items.js-navigable-stream').innerHTML = ''

    setTimeout(() => { 
      window.scrollTo(0, 0)  
    }, 100 + Math.random() * 100)

    setTimeout(() => {
      window.scrollTo(0,document.body.scrollHeight)  
    }, 200 + Math.random() * 100)

    setTimeout(unlikeAll, 500 + Math.random() * 1500)  
  })
}

unlikeAll()