---
title: "NicoViewer – Chrome extension stats, history and permissions"
description: "133 users, rated 3.00 by 1 person. Version 0.4.1, updated 2026-05-31. Requests 8 permissions."
url: "https://extensiontracker.com/extension/fnkechmaclbijldkepjjknpkeplakmon"
---

# NicoViewer

Live in the Chrome Web Store.

- Users: 133
- Rating: 3.00 from 1 rating
- Last checked: 2026-09-27 01:21 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #58,971 of 264,703 live extensions
- Rank in Accessibility: #2,589 of 7,982

## The listing

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

Summary from the listing:

> ニコ生ビュワー

- Extension ID: `fnkechmaclbijldkepjjknpkeplakmon`
- Developer: [なかむーら](https://extensiontracker.com/developer/u6d87b23303d5190c3caa5c693d2e3594)
- Category: [Make Chrome Yours › Accessibility](https://extensiontracker.com/category/make_chrome_yours/accessibility)
- First published: 2021-12-30
- Last updated: 2026-05-31
- Version: `0.4.1`
- Size: 1.08 MiB
- Minimum Chrome: 88
- Languages (1): 日本語
- Support page: `https://twitter.com/nakamura_keng0`
- Chrome Web Store: <https://chromewebstore.google.com/detail/nicoviewer/fnkechmaclbijldkepjjknpkeplakmon>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Ffnkechmaclbijldkepjjknpkeplakmon>

## Users over time

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

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 133 | 3.00 | 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.

**Every website:** it can read and change your data on all the sites you visit.

### Sites

- `<all_urls>`: Every website
- `file://*/*`: Every website
- `http://www.chikuwachan.com/*`: www.chikuwachan.com
- `https://papi.live.nicovideo.jp/*`: papi.live.nicovideo.jp

### Sites where it runs scripts

- `https://live.nicovideo.jp/watch/*`: live.nicovideo.jp
- `https://live2.nicovideo.jp/watch/*`: live2.nicovideo.jp

### Browser features

- `activeTab`: The tab you're on, only after you click the extension
- `downloads`: Manage your downloads
- `sidePanel`: Show a side panel
- `tabs`: Read the addresses and titles of your tabs

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [NicoMultiViewer](https://extensiontracker.com/extension/hfmjknaagjhcbkkjphdemaajlhhdiamh) | 13 | – | – | Accessibility |
| [NicoGeViewer](https://extensiontracker.com/extension/jjpgmdlmejphlnadhkccplgffgkidfoc) | 11 | 5.00 | 1 | Entertainment |

All 3 extensions by [なかむーら](https://extensiontracker.com/developer/u6d87b23303d5190c3caa5c693d2e3594).

## 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 01:21 UTC; next check around 2026-10-02.

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

## Cite this page

Extension Tracker. “NicoViewer” (fnkechmaclbijldkepjjknpkeplakmon). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/fnkechmaclbijldkepjjknpkeplakmon. Accessed 2026-09-28.

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

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/fnkechmaclbijldkepjjknpkeplakmon>. 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`.