# YouTube Auto Expand Description

> YouTubeの動画ページの概要欄を自動的に拡大します。 Automatically expands the description box on YouTube video pages.

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

## Overview

- **ID:** `youtubeautoexpanddescription`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** もんごる
- **Category:** photos-music-videos
- **Daily users:** 9
- **Weekly downloads:** 1
- **Version:** 1.3
- **Last updated:** 2025-06-27
- **First published:** 2025-05-05
- **Size:** 204 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/youtubeautoexpanddescription/)
- **Website:** [https://x.com/mongol\_JPN\_sfw](https://x.com/mongol_JPN_sfw)

## Description

<strong>YouTubeの動画ページを開いたら、概要欄を自動で展開！</strong>
<strong>面倒なクリック操作は不要。アドオンをインストールするだけで、すぐに動作します。</strong>

<strong>Automatically expands the description section on YouTube video pages!</strong>
<strong>No more manual clicks—just install the add-on and it works right away.</strong>

<strong>✅ 主な特徴 / Key Features</strong>
<ul><li>YouTubeの動画ページを開くと、概要欄を自動で表示 ／ Automatically expands the video description when a YouTube page loads</li><li>シンプル＆軽量、バックグラウンド動作なし ／ Lightweight and simple – no background activity</li><li>一度導入すれば、あとは自動で快適に！ ／ Set it and forget it – works seamlessly after installation</li></ul>
<strong>⚠️注意事項 / Attention</strong>
特定の拡張機能を使用して、動画領域を自動でブラウザ領域最大まで拡大させていると、この拡張機能はうまく動かない事が多いです。その場合は拡大させる機能をOFFにしてください。
If you use certain extensions to automatically expand the video area to the maximum browser area, this extension often does not work well.If this is the case, please switch off the function to enlarge the area.

<strong>🔗 Chromeユーザーの方はこちらもどうぞ / Chrome Users Welcome!</strong>
Chrome版もご用意しています！
<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/0a99494f1cdd5c87a42b2d4c1c386d216258696d01e5b13acc83310fd38aa35a/https%3A//chromewebstore.google.com/detail/oidhllimoacolngmiahggnmiikkgmiie%3Futm_source=item-share-cb" rel="nofollow">Chrome ウェブストアで見る / Available on Chrome Web Store</a>

<strong>📮 フィードバック・連絡先 / Feedback and contact details</strong>
不具合報告や機能の要望などがありましたら、以下のXアカウントまでご連絡ください。
対応できる範囲で迅速に対応いたします。
If you have any bug reports or feature requests, please contact the X account below.
We will respond as quickly as we can.
𝕏 ： <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/88c73a169b31594dc18d88794ed738994912b7372e4f71ec9542e8c2ccef7d7c/https%3A//x.com/mongol_JPN_sfw" rel="nofollow">@mongol_JPN_sfw</a>

## Rankings

- #35,436 — Overall
- #33 — expand
- #55 — subscription
- #202 — script

## Permissions and access

### Permissions

- `activeTab`

### Host permissions

- `https://www.youtube.com/*`

### Content script matches

- `www.youtube.com`

## Safety

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

### Analysis details

- Request access to the following domains: youtube.com
- 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).

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