Show full domain on HN is a free Chrome extension developed by simonbrown60. It falls under the category of Browsers and is classified as an Add-ons & Tools.

The extension aims to enhance the browsing experience on Hacker News by displaying the full domain name next to titles. By default, Hacker News only shows a portion of the domain name for most sites, but with this extension, users can easily view the complete domain name unless it starts with "www".

With Show full domain on HN, users can quickly identify the source of the news articles and have a better understanding of the website they are about to visit. This can be particularly helpful in distinguishing between different subdomains or websites with similar names.

Overall, Show full domain on HN is a useful Chrome extension for Hacker News enthusiasts who want to have more information about the sources of the articles they come across.