Happy Twitter is a free Chrome add-on developed by gabrielolferrari. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This add-on aims to enhance your Twitter experience by replacing unpleasant tweets with happy content, bringing a positive touch to your day.

With Happy Twitter, not only will it block unwanted posts from Monark, but it will also replace them with cheerful content, aiming to compensate for any negative emotions you may have encountered during your day. The add-on promises to provide a pleasant browsing experience on Twitter.

The developer has plans for future updates, including the introduction of random cute kittens and the ability to customize the users whose tweets are replaced. These upcoming features will provide users with more options to personalize their Happy Twitter experience beyond just kittens.

Overall, Happy Twitter is a Chrome add-on that aims to make your Twitter feed a happier place by replacing unpleasant tweets with joyful content. With its future updates, it promises to offer even more customization options and delightful surprises.