---
title: "Hacker News Duplicate Detector – Chrome extension stats, history and permissions"
description: "35 users, rated 5.00 by 1 person. Version 1.10.0, updated 2024-03-19. Requests 2 permissions."
url: "https://extensiontracker.com/extension/ocagpmnfhgbgmbaaimpehpbnnplkmpkd"
---

# Hacker News Duplicate Detector

Live in the Chrome Web Store.

- Users: 35
- Rating: 5.00 from 1 rating
- Last checked: 2026-09-27 06:38 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #96,594 of 264,702 live extensions
- Rank in Accessibility: #3,809 of 7,982

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> Detects duplicate HN submissions.

- Extension ID: `ocagpmnfhgbgmbaaimpehpbnnplkmpkd`
- Developer: [dstein64](https://extensiontracker.com/developer/u87cc30d9cfa31d3f163ba05640f0ae0c)
- Category: [Make Chrome Yours › Accessibility](https://extensiontracker.com/category/make_chrome_yours/accessibility)
- First published: 2016-12-26
- Last updated: 2024-03-19
- Version: `1.10.0`
- Size: 21.7 KiB
- Minimum Chrome: 88
- Languages (1): English
- Website: `dannyadam.com`
- Chrome Web Store: <https://chromewebstore.google.com/detail/hacker-news-duplicate-det/ocagpmnfhgbgmbaaimpehpbnnplkmpkd>
- View the code or download the CRX, in CRX Peek: <https://crxpeek.com/?id=ocagpmnfhgbgmbaaimpehpbnnplkmpkd>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 35 | 5.00 | 1 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

### Sites

- `https://hn.algolia.com/api/v1/search?query=*`: hn.algolia.com

### Sites where it runs scripts

- `https://news.ycombinator.com/item?id=*`: news.ycombinator.com

### Browser features

- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [Auto Highlight](https://extensiontracker.com/extension/dnkdpcbijfnmekbkchfjapfneigjomhh) | 30,000 | 3.64 | 25 | Workflow & Planning |
| [recrun](https://extensiontracker.com/extension/ocikmakgbemmhogikcbcbkebeephjcno) | 61 | 3.00 | 2 | Accessibility |
| [Bar Charts for Hacker News Polls](https://extensiontracker.com/extension/dpdhhdidaaippolkbadpdhlffnpnjimd) | 43 | 5.00 | 2 | Workflow & Planning |

All 4 extensions by [dstein64](https://extensiontracker.com/developer/u87cc30d9cfa31d3f163ba05640f0ae0c).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 2026-09-27 06:38 UTC; next check around 2026-10-25.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “Hacker News Duplicate Detector” (ocagpmnfhgbgmbaaimpehpbnnplkmpkd). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/ocagpmnfhgbgmbaaimpehpbnnplkmpkd. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_ocagpmnfhgbgmbaaimpehpbnnplkmpkd,
  title   = {Hacker News Duplicate Detector (ocagpmnfhgbgmbaaimpehpbnnplkmpkd)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/ocagpmnfhgbgmbaaimpehpbnnplkmpkd},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/ocagpmnfhgbgmbaaimpehpbnnplkmpkd>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.