Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of Dictionary on Click

Dictionary on Click by bishwodahal

Double-click any word on the web for an instant definition. Free lookups from Wiktionary with no API keys. Toolbar dictionary, 18 languages, themes, pronunciation, and local-only privacy.

0 (0 reviews)0 (0 reviews)
Download Firefox and get the extension
Download file

Extension Metadata

About this extension
Dictionary on Click

Look up words while you read — without leaving the page, signing up, or pasting text into another tab.

How it works

Double-click any word on a web page. A small definition bubble appears next to your cursor with meanings, part of speech, and pronunciation when available.

Use the toolbar button to open the full dictionary panel. Type a word, pick a language, and read longer entries with links to Wiktionary.

Why you might like it
  • Fast — definitions show up right where you are reading
  • Free — no subscription and no API keys to set up
  • Works on most sites — any normal http or https page
  • Many languages — Arabic, Chinese (Simplified & Traditional), Czech, Dutch, English (UK & US), French, German, Hindi, Italian, Japanese, Korean, Portuguese (Brazil), Russian, Slovak, Spanish, and Turkish
  • Listen — tap the speaker icon to hear pronunciation when audio is available
  • Light or dark — follow your system theme or choose one in settings

Privacy
  • Lookup history is optional and stored only on your device
  • No remote telemetry — usage stats never leave your browser
  • Words you have looked up before may be cached locally so repeat lookups are quicker

Settings

Open Add-ons → Dictionary on Click → Preferences (or right-click the toolbar icon → Manage Extension → Preferences) to change:
  • Dictionary language and translation target
  • Theme (system, light, or dark)
  • Whether to save history
  • Export or clear history and diagnostics

If a definition looks wrong, use the report button on a lookup — reports stay on your device until you export them.

Where definitions come from

Definitions are fetched from free public sources, mainly Wiktionary. English lookups may also use the Free Dictionary API and Datamuse. Content is shown under their licenses; full attribution is on the options page.

Getting started
  1. Install the add-on
  2. Pin Dictionary on Click from the puzzle-piece menu in the toolbar
  3. Double-click a word on any page — or click the icon to search manually
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Access your data for all websites

Optional permissions:

  • Access your data for sites in the wiktionary.org domain
  • Access your data for sites in the wikipedia.org domain
  • Access your data for upload.wikimedia.org
  • Access your data for api.dictionaryapi.dev
  • Access your data for api.datamuse.com

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Support site
  • Copy add-on ID
Version
0.1.1
Size
106.97 KB
Last updated
12 days ago (May 20, 2026)
Related Categories
  • Search Tools
  • Language Support
License
MIT License
Version History
  • See all versions
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.