HNDN is a free Chrome extension developed by SDSLabs that keeps you informed about the latest top and new stories from Hacker News. With this extension, you can receive notifications as soon as new stories arrive, allowing you to stay up to date with the latest information.

One of the key features of HNDN is the ability to choose from eight different notification sounds. This allows you to customize the alert tone to your preference, making it easier to distinguish between different types of notifications. Additionally, the extension offers an auto-clear timing feature, which allows you to set a specific time for the notifications to be automatically cleared.

To ensure that HNDN runs in the background automatically, simply go to Settings, select "Show advanced settings," navigate to System, and tick the option that says, "Continue running background apps when Google Chrome is closed." This will ensure that you never miss out on any important updates from Hacker News.

HNDN is a valuable tool for anyone who wants to stay informed about the latest stories on Hacker News. With its customizable notification sounds and auto-clear timing feature, it offers a convenient way to keep up with the latest information without having to constantly check the website.