sort-tweets.js

(function(){
  'use strict';
  
  // Twitter overwrites console.log; this restores it
  console.log = Object.getPrototypeOf(console).log;
  
  let $container = $('.stream-items');
  let $items = $container.children('.stream-item');
  
  console.log(`Number of items at the beginning: ${$items.length}`);
  
  let time_top = Date.now() - 1000*60*60* 12; // hours ago
  let time_bottom = Date.now() - 1000*60*60* 24; // hours ago
  
  $container.css({ display: 'flex', flexDirection: 'column-reverse' });
  
  $items.each((i, item) => {
    let $item = $(item);
    let $tweets = $item.find('.tweet');
    let all_nums = [];
    let all_times = [];
    
    // filter out promoted tweets and remove them from the DOM
    if ($tweets.filter('[data-disclosure-type="promoted"]').length > 0) {
      $item.remove();
      return true; // skip to next iteration
    }

    $tweets.each((i, tweet) => {
      let $tweet = $(tweet);
      
      // get the number or favorites and retweets for this tweet
      let tweet_nums = $tweet
        .find('.ProfileTweet-actionList')
        .children('.ProfileTweet-action--retweet, .ProfileTweet-action--favorite')
        .find('.ProfileTweet-actionCount:visible')
        .map((i, elem) => Number(elem.textContent)).toArray();
      
      // all numbers of all tweets under one $item are pushed onto the same array
      all_nums = all_nums.concat(tweet_nums);
      
      all_times.push(+$tweet.find('._timestamp').attr('data-time-ms'));
    });
    
    // 1. if at least one of the $item’s times is within the [time_bottom, time_to] range
    for (let time of all_times) {
      if (time < time_top && time > time_bottom) {
        
        // 1.1 set the Flexbox order property on the $item to the highest number value
        $item.css({ order: Math.max.apply(Math, all_nums) });
        return true; // 1.2 and skip to next iteration
      }
    }
    
    // 2. otherwise, remove this $item
    $item.remove();
  });
  
  console.log(`Number of items at the end: ${$container.children('.stream-item').length}`);
}());

You should turn this in to a Chrome Extension :)