Hacked Hacker News is a free Chrome add-on developed by prophetjohn that aims to enhance the browsing and commenting experience on Hacker News. With this add-on, users can enjoy improved comment threads, an endless front page, and various keyboard shortcuts for navigating through comments.

The add-on introduces several features to enhance comment threads on Hacker News. It tracks whether or not you have read a comment, ensuring that you never miss any important discussions. Old comments are automatically cleaned out after a few days, keeping the threads fresh and relevant. Unread comments are highlighted, making it easy to identify new content. Additionally, the number of new comments per thread is displayed in the header, allowing users to quickly gauge the activity level of each discussion.

Hacked Hacker News also streamlines the process of interacting with comments. Users can submit new comments, edit existing ones, and delete comments without leaving the page or losing their place in the thread. This convenience saves time and makes it easier to actively participate in discussions. The add-on also provides keyboard shortcuts for efficient navigation: pressing "j" takes you to the next unread comment, "a" allows you to upvote the current comment, "z" lets you downvote, and "r" allows you to reply.

In addition to improving comment threads, Hacked Hacker News offers an endless front page. Users can simply click "More" to load new stories, which are then seamlessly inserted into the existing page. This eliminates the frustration of encountering "Unknown or expired link" messages, as the add-on automatically retrieves fresh links if the current one expires.

Overall, Hacked Hacker News is a valuable tool for users who frequent Hacker News. With its enhanced comment threads, convenient comment interaction, and endless front page, browsing and participating in discussions on Hacker News becomes more streamlined and enjoyable.