LEO Dictionaries

Name: LEO Dictionaries
Rating: 4.7308 (26 reviews)
Author: LEO GmbH

This is the official add-on for easier access to LEOs Online Dictionaries. Select any word or phrase, right-click on the selection and translate from/to English, French, Spanish, Italian, Chinese, Russian, Portuguese and Polish to/from German.

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Features & Capabilities

LEO Dictionaries is the official Chrome extension designed for seamless access to LEO's Online Dictionaries. With this add-on, you can quickly translate selected words or phrases between German and multiple languages including English, French, Spanish, Italian, Chinese, Russian, Portuguese, and Polish. Simply highlight text, right-click to open the context menu, and choose the appropriate dictionary to get instant translations.

Customize the extension by enabling only the dictionaries you need and control how results are displayed—whether in a new window, new background tab, or new tab. This tool enhances browsing efficiency and supports language learners, translators, and multilingual communicators by integrating powerful dictionary resources directly into your browser experience.

User Growth & Download Statistics

Add-on Education Communication

By:

Daily users:

Rating:

Version:

5.1.0 Last updated: 2025-08-12

Version code:

6011146

Creation date:

2011-03-23

Risk:

Permissions:

Size:

40.93KB

Email:

di*****@leo.org

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-21

Compare stats and ranking:

Ranking

# 1,294 ▲ 18

Other rankings

#48 in Language Support

#139 in Search Tools ▲ 1

#16 in phrase keyword 10 ▼ 1

#28 in section keyword 3

#31 in dictionary keyword 47

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Other platforms

LEOs Dictionaries (v5.1.0)

3,000 4.00

(5)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

LEO GmbH

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/leo-dictionaries/

Email:

di*****@leo.org

Website:

http://www.leo.org

Permission Change History

2025-08-12: Version 5.0.1 → 5.1.0

Add Permissions: activeTab scripting tabs

2025-08-11: Version 3.4.2resigned1 → 5.0.1

Remove Permissions: tabs

User Reviews

Users praise LEO Dictionaries as fast, simple and reliable—especially for single-word lookups and via the context menu. The most-mentioned issues are that lookups open a new tab (many want inline results) and the lack of a quick activation shortcut or easier selection method.

Pros

Fast and effective for single-word lookups
Easy to use—many users say it “does what it says” or is “perfect” for quick translations
Context-menu integration makes lookups convenient while browsing
Long-term stability and reliability reported by multiple users

Cons

Translation results open in a new tab instead of inline on the same page (frequent complaint)
No built-in quick activation shortcut or simpler activation (users ask for keyboard shortcuts or multi-click options)

Recent reviews

I really like it, but would like it even more if I could set up a shortcut to look up words seamlessly. I know the challenge comes from having several possible languages, but allowing a shortcut for each or at least the possibility to choose a single language for quick look up would be very nice.

by Fi*****, 2025-08-10

by 退出*****, 2025-03-27

by 远离*****, 2025-02-12

View all user reviews ›

Is LEO Dictionaries Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

LEO Dictionaries requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

LEO Dictionaries is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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