Stable signalNo paid features detectedMedium-risk permissions

Mouse Dictionary

A super fast dictionary for language learners

Users100KCurrent public install base

Rating4.7Store average score

Reviews116Public review volume

Manifest versionV3Extension platform version

7-day growth0Net users gained this week

7-day growth rate0%Relative weekly velocity

Preview

Mouse Dictionary Media preview

2 assets

Trend

User growth trend

Review user movement across collected snapshots.

User Growth Over Time

Rating trend

7-day rating trend

View collected rating snapshots from the latest 7-day window to assess rating stability.

7-day rating change

Start

4.73

Latest

4.73

7-day rating change

0.00

2026年7月13日2026年7月19日

Growth overview

Daily, weekly, and monthly growth

Compare 1-day, 7-day, and 30-day net growth and growth rate.

1-day growthNo data

----

7-day growthFlat

00%

30-day growthNo data

----

Technical snapshot

Version, languages, and crawl freshness

Review publication date, version, supported languages, and crawl timestamps.

Version1.7.1

ManifestV3

Size3.76MiB

Languages2English / 日本語

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

Mouse Dictionary is a super fast dictionary for Google Chrome.

Designed mainly for English and Japanese.

Features:

* Super fast!!!

* Awesome phrases detection

* Capable of importing your own text data

Reviews

Recent review snapshot

Inspect the latest comments and rating distribution.

Store average score4.7Chrome Web Store aggregate rating, including ratings without synced review text

Synced text average4.7Average computed only from synced review bodies below

Reviews with text71Synced review bodies

Total ratings / reviews116Chrome Web Store public rating/review count

Store average score: 4.7. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

5★

4★

3★

2★

1★

gali Ma2018年9月4日

excellent work!

Showing 71 results

1...4 5 6 7 8

Similar and related extensions

Review related products from the Chrome Web Store detail page.

英辞郎 on the WEB 拡張機能

Tools

アルクが公開している英和・対訳オンライン検索サービス「英辞郎 on the WEB」を、その場で便利に検索できる拡張機能です。「英辞郎 on the WEB Pro / Pro Lite」にも対応。※「英辞郎」は道端早知子氏の登録商標です。

Weblioポップアップ英和辞典

Education

Webページの英語にマウスオーバーさせることで「英和辞典」での意味を表示させるポップアップ辞書機能や、文章を選択することで翻訳結果へスムーズに移動することができる機能を備えた、Weblio公式のエクステンションです。

その本、図書館にあります。

Tools

amazonで今、見ている本が近所の図書館にあるかどうかが分かります。

はてなブックマークブックマーク機能

Workflow & Planning

気になるWebページを簡単にブックマークできる、はてなブックマーク公式の拡張機能です。

iKnow! ポップアップ辞書

Workflow & Planning

WEBサイトに出てくる英単語の意味をマウスオーバーするだけで簡単に調べられる、iKnow! 公式のポップアップ英和辞書です。

Gossip Site Blocker

Workflow & Planning

Hide harmful sites from Google search results.

AI product read

Mouse-hover dictionary extension for Chrome that shows instant word definitions when hovering over text

Eliminates the need for language learners (especially English-Japanese) to manually look up words in a separate dictionary application, providing instant inline translations

User installs the extension and activates it by clicking the extension icon. When browsing any web page (including PDFs and YouTube), hovering the mouse over a word instantly displays a popup with the word's definition from the built-in English-Japanese dictionary. The popup shows the headword, pronunciation button, and full definition. Users can customize the popup appearance, import additional dictionaries, and use keyboard shortcuts to scroll through definitions. The extension operates entirely locally with no external API calls needed.

Target users: English language learners studying Japanese / Japanese language learners studying English / Language students reading web content in their target language / Researchers reading foreign-language documents

All source code is minified/bundled, making individual feature attribution difficult, though the overall architecture is clear
Dictionary data files are very large (several MB each) making exhaustive inspection impractical, but they consistently contain dictionary entries rather than code
The options/options.js file is 908KB of minified code containing bundled React and Ace editor libraries, making it hard to distinguish extension-specific code from library code

Monetization

No paid features detected

No payment platform integrations, no freemium gating, no upgrade prompts, no subscription model found. All keyword hits for 'pro' were from CSS font names (e.g., 'hiragino kaku gothic pro'), minified code variable names, or dictionary data entries. 'Premium' hits were solely from English-Japanese dictionary entries defining the word 'premium'. The extension is open-source on GitHub (github.com/wtetsu/mouse-dictionary) and appears completely free. No Stripe, payment, billing, subscription, or purchase code exists anywhere.

Confidence: 95
Payment platform: --
Source: AI / High
Login required: No
Reason: No login UI, authentication code, OAuth flows, or credential management found anywhere in the extension. All keyword hits for 'login', 'account', 'signin', 'session', 'token' were false positives from dictionary data files (Japanese-English dictionary entries containing these English words as headwords). The extension operates entirely offline using bundled dictionary JSON files and Chrome local storage for settings. No API calls requiring authentication were found.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：storage、activeTab、scripting

Publisher

Tetsu

Independent publisher

Email: [email protected]
Phone: --
Address: --

Public contact fields are shown above. Developer portfolio pages are available on paid accounts.

View developer portfolio

Permissions

Host access

Mouse Dictionary

Mouse Dictionary Media preview

User growth trend

User Growth Over Time

7-day rating trend

7-day rating change

Daily, weekly, and monthly growth

Version, languages, and crawl freshness

Product summary

Recent review snapshot

Similar and related extensions

英辞郎 on the WEB 拡張機能

Weblioポップアップ英和辞典

その本、図書館にあります。

はてなブックマーク ブックマーク機能

iKnow! ポップアップ辞書

Gossip Site Blocker

はてなブックマークブックマーク機能