# NicoOpener

> ニコニコ動画のコンテンツIDをページから見つけて、アプリで開けるようにする拡張機能です

Canonical page: [https://chrome-stats.com/d/nicoopener](https://chrome-stats.com/d/nicoopener)

## Overview

- **ID:** `nicoopener`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** kiichi toura
- **Category:** appearance,other
- **Daily users:** 19
- **Version:** 1.0.4resigned1
- **Last updated:** 2024-04-25
- **First published:** 2016-10-31
- **Size:** 1.17 MB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/nicoopener/)
- **Website:** [https://github.com/tor4kichi/NicoOpener/issue](https://github.com/tor4kichi/NicoOpener/issue)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/nicoopener/privacy/](https://addons.mozilla.org/firefox/addon/nicoopener/privacy/)

## Description

NicoOpener is a Firefox add-on that enables you to find NicoNico Douga content IDs on a page and open them in an app. It requires setting the app and niconico protocol association in the options screen after installation.

## Rankings

- #25,287 — Overall
- #197 — openvpn
- #213 — openclaw
- #217 — open vpn
- #236 — openai
- #242 — open ai

## Permissions and access

### Permissions

- `http://*/*`
- `https://*/*`
- `tabs`
- `contextMenus`
- `webNavigation`
- `activeTab`

### Content script matches

- `twitter.com`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [ExNicoExtension](https://chrome-stats.com/d/exnicoextension)
- [niconico omnibox](https://chrome-stats.com/d/niconico-omnibox) — 2 users
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- [Niconico Downloader](https://chrome-stats.com/d/niconico-downloader) — 3,091 users, 4.09 / 5
- [nicovideo-next-video-canceler](https://chrome-stats.com/d/nicovideo-next-video-canceler) — 23 users
- [New NicoLive Helper](https://chrome-stats.com/d/new-nicolive-helper) — 110 users, 5.00 / 5
- [ニコ生ツリー転送ツール](https://chrome-stats.com/d/%E3%83%8B%E3%82%B3%E7%94%9F%E3%83%84%E3%83%AA%E3%83%BC%E8%BB%A2%E9%80%81%E3%83%84%E3%83%BC%E3%83%AB) — 1 users
- [ニコニコダウンローダ Niconico Downloader](https://chrome-stats.com/d/%E3%83%8B%E3%82%B3%E3%83%8B%E3%82%B3%E3%83%80%E3%82%A6%E3%83%B3%E3%83%AD%E3%83%BC%E3%83%80) — 972 users, 5.00 / 5
- [ニコニコツール](https://chrome-stats.com/d/%E3%83%8B%E3%82%B3%E3%83%8B%E3%82%B3%E3%83%84%E3%83%BC%E3%83%AB) — 3 users
- [nicodw](https://chrome-stats.com/d/nicodw) — 61 users, 2.50 / 5
- [nicoExpansion](https://chrome-stats.com/d/nicoexpansion) — 50 users, 5.00 / 5
- [nico-skip](https://chrome-stats.com/d/nico-skip) — 1 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/nicoopener)