HNOP is a free Chrome extension designed to simplify the process of recognizing the original poster (OP) in Hacker News threads. By installing this add-on, users can easily identify comments made by the author of a Hacker News thread. This tool aims to enhance the browsing experience for individuals who frequent Hacker News discussions.

With HNOP, users can quickly spot comments from the thread's OP, streamlining the process of following conversations and understanding the context within Hacker News threads. This extension falls under the category of Browsers, specifically in the Add-ons & Tools subcategory, offering a convenient solution for those seeking clarity in online discussions.