What it does:

- Add a tagging system to Hacker News.
- Add topic-contextual data, on hacker news threads.

---

You can download the extension here.

---

How It works:




1- When you are on Hacker News main page,
you get a list of all tags available on a side panel.







2- On a story you have a "Data" tab on the side panel.
If you click on it, you'll see suggested data for that story.





3- When you click to read the comments on a story,
you get a list of tags that have been added so far.



You can add data or upvote the data you find relevant.