Hacker News Collapsible Comments is a Chrome add-on developed by muitocomplicado. This free program falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

The main feature of this add-on is the addition of reddit-like [+] and [-] links to collapse and expand comment threads on Hacker News. This allows users to easily navigate through long comment threads and focus on the discussions that interest them the most.

The add-on is based on the bookmarklet code created by niyazpk and has been updated to support HTTPS. With version 1.3, the collapsible comments script has been improved for a smoother user experience.

If you're an active user of Hacker News and find yourself struggling to navigate lengthy comment threads, Hacker News Collapsible Comments is a useful tool that can enhance your browsing experience.