how to delete your tweets just using your browser, no oauth required

gistfile1.js

// 1. go to your twitter feed with tweets and replies
//    for example, mine was twitter.com/6a68/with_replies
// 2. scroll all the way down to the bottom of the page.
//    I suppose you could automate this with JS, but I didn't.
// this function will delete tweets you can delete, i.e. not retweets:
function deleteTweets() {
  // find the next delete button in the DOM (next deletable tweet)
  // and click the delete button. I wanted to keep the first tweet,
  // which is why the index here is 1.
  if (!$('.js-actionDelete').length) { 
    return console.log('all done deleting');
  }
  $('.js-actionDelete')[1].click();
  // click the button to confirm the deletion
  $('.delete-action').click();
  // do it again
  setTimeout(deleteTweets, 1000);
}

// next, we want to unretweet the retweets. probably good to reload the page
// before running this one.
function unretweet() {
  els = $('.is-retweeted .js-actionRetweet');
  for (var i = 0; i < els.length; i++) {
    if (els[i].classList.contains('ProfileTweet-actionButtonUndo')) {
      els[i].click()
    }
  }
}
unretweet();

// next, go to the favorites page.
// scroll to the bottom to load 'em all.
function whatever() {
  els = $('.is-favorited .js-actionFavorite');
  for (var i = 0; i < els.length; i++) {
    if (els[i].classList.contains('ProfileTweet-actionButtonUndo')) {
      els[i].click()
    }
  }
}
whatever();

// unfollowing too? yeah?
// yeah. let's do it.
// open the following page, croll to the bottom, and do it:
function unfollow() {
  // doing .each seems to freak out the DOM, so use setTimeout(0).
  $('.following button.follow-button')[0].click();
  setTimeout(unfollow)
}
unfollow();