# Life Science Dictionary Tool

> ライフサイエンス辞書ツールは、Webページ中の広範囲な生命科学用語を翻訳することが出来るマウスオーバー辞書です。ライフサイエンス辞書プロジェクト( https://lsd-project.jp/ )によって収集された10万語の英語用語、11万語の日本語用語を、用例・遺伝子情報などと共にご利用いただけます。 本アドオンはFirefox57以降での動作に対応したWebExtension版です。旧ライフサイエンス辞書とは動作が異なる部分がありますので、ご注意ください。

Canonical page: [https://chrome-stats.com/d/life-science-dictionary-tool](https://chrome-stats.com/d/life-science-dictionary-tool)

## Overview

- **ID:** `life-science-dictionary-tool`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** LIFE SCIENCE DICTIONARY PROJECT and BITS
- **Category:** language-support,other
- **Daily users:** 403
- **Weekly downloads:** 2
- **Rating:** 3.38 / 5 (13 ratings)
- **Version:** 0.1.2018.50127resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-10-30
- **Size:** 9.68 MB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/life-science-dictionary-tool/)
- **Website:** [http://www.lsdtools.org/](http://www.lsdtools.org/)

## Description

**Life Science Dictionary Tool**は、Webページ上の幅広い生命科学用語を即座に翻訳できるマウスオーバー辞書です。ライフサイエンス辞書プロジェクトによって収集された豊富な用語データベース（英語10万語、日本語11万語）を搭載し、用例や遺伝子情報と共に提供します。

専門用語や熟語に対応しており、マウスを単語に重ねるだけで詳細な意味や関連語をポップアップ表示。Firefox 57以降のWebExtension版として動作し、旧バージョンとは一部機能が異なりますが、生命科学分野の研究者・学生・専門家にとって欠かせないツールです。なお、ファイルサイズが大きいのでダウンロードに時間がかかる場合があります。

## Rankings

- #5,672 — Overall
- #238 — Language Support
- #34 — life
- #82 — dictionary
- #120 — tool
- #147 — section

## Permissions and access

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate 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 website URL may be invalid

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

## Review summary

Users appreciate that the Life Science Dictionary Tool is now compatible with Firefox Quantum and retains its dictionary functionality for known terms. However, many find it less useful because it fails to define unfamiliar words and lacks the handy feature to display definitions only upon pressing a key. Additionally, previous menu options are missing, causing usability issues. The add-on sometimes does not show expected popups after installation, and outdated usage documentation further hinders user experience. Users hope for updates to restore key features and improve usability.

### Pros

- Integration with Firefox Quantum is available now, which users appreciate.
- Offers dictionary functionality that shows meanings of known terms.
- User experience is satisfactory and meets previous standards after updates.

### Cons

- Does not display dictionary meanings for unknown or less common words, limiting usefulness.
- Lacks feature to show dictionary only when a specific key is pressed, making it less user-friendly.
- Menu and controls available in previous versions (pre-Quantum) are missing in the current version.
- Installation issues such as no popup appearing after restart, causing confusion.
- Documentation or usage instructions are outdated and do not reflect current add-on behavior.

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Source: [Chrome-Stats](https://chrome-stats.com/d/life-science-dictionary-tool)