Hacker News - hide visited comments is a Chrome add-on developed by Robert Irelan. This free program falls under the category of browsers and specifically belongs to the subcategory of add-ons & tools. Its main purpose is to automatically hide comment pages that you have visited on Hacker News.

With Hacker News - hide visited comments, you no longer have to manually keep track of which comment pages you have already visited. The add-on takes care of this for you by automatically hiding the pages that you have already viewed. This can be a useful feature to have, especially if you frequently visit Hacker News and want to focus on new and unseen comment threads.

Overall, Hacker News - hide visited comments is a handy Chrome add-on that simplifies your browsing experience on Hacker News by automatically hiding comment pages that you have already visited. It saves you time and effort by keeping track of your visited pages, allowing you to easily identify new and unread comment threads.