Lexicon (Instant Dictionary) Firefox

Lexicon (Instant Dictionary)

By: akvedi
Quickly Define Words While You Browse By Just Double Clicking On The Word, Create and Organize Your Own Word Bank With Personal Dictionary
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Features & Capabilities

Lexicon extension for Firefox makes reading a breeze! No more interruptions to search for word meanings. Double-click any word and instantly view its definition in a pop-up bubble. Stay focused on what you're reading and expand your vocabulary effortlessly. Supports Spanish, German, French, English, and HIndi.

To manage the extension and view personal dictionary click on the toolbar icon.

Features:

  • Instant word definition
  • Customizable trigger
    • Only Double Click
    • Ctrl + Double Click
    • Alt + Double Click
    • Shift + Double Click
    • Hightlight and Right Click
  • Multiple Definitions Upto 5
  • Word history
  • Pronunciation Support
  • Download word history as JSON
  • Multilingual support
    • English
    • French
    • German
    • Spanish
    • Hindi
  • Dark Mode
  • Fast and lightweight
If you are using Firefox version 62 and below, Enable dom.webcomponents.shadowdom.enabled in about:config for the extension to work. Extension does not work in reader mode and pdf because content scripts are not allowed to operate.

User Growth & Download Statistics

Manifest V2 Add-on
By:
akvedi
Daily users:
52
Rating:
3.08
(13)
Version:
1.7.0 Last updated: 2025-03-19
Version code:
5913264
Creation date:
2023-04-10
Risk:
High risk impact Low risk likelihood
Permissions:
Content scripts matches:
  • <all_urls>
Size:
59.71KB
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-23
Compare stats and ranking:

Ranking

# 15,134 ▲ 16
Other rankings
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For Developers

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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:
akvedi
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/lexicon/

Permission Change History

2025-03-19: Version 1.6.7 → 1.7.0
Add Permissions: https://www.bing.com/

User Reviews

Doesn't work :( Keeps saying "No definition found." no matter what language I pick or what word I highlight.
by Mo*****, 2026-04-18
by So*****, 2025-09-27
doesn't work. try another one.
by Al*****, 2025-07-23
View all user reviews ›

Is Lexicon (Instant Dictionary) 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.

Lexicon (Instant Dictionary) requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • Critical ******* ****** ** *** ********* ******** *********** ********
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
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.

Lexicon (Instant Dictionary) has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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