Double-click a word on any website and instantly get its definition at TheFreeDictionary.com, the world's most comprehensive dictionary! Or use the search bar to search directly from the browser toolbar.

The Free Dictionary - Firefox Add-On
The Free Dictionary is a powerful Firefox add-on that allows you to get instant definitions for words on any website. You can also search directly from the browser toolbar. Enhance your browsing experience with The Free Dictionary.
Add-on stats
Manifest V2
By: Farlex, Inc.
Weekly download count: 15
Firefox on Android: No
Permissions:
- tabs
- contextMenus
Size: 20.69K
Email: su*****@tfd.com
URLs: Website ,Privacy policy
Full description: See detailed description
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
User reviews
Works MUCH better than Dictionary Anywhere, (which doesn't work at all), I can tell you that. It takes you to a different page but it works. The redirect is likely why this add on isn't more popular.
by No_I_Am_Not_A_Bot_Shut_Up, 2025-03-15
by 敬念法轮大法好远离瘟疫, 2025-03-02
I like this add-on for several reasons. It does not just provide a single cryptic definition of a word, but rather opens The Free Dictionary web page for that word. You then have access to all of the information for that word.
Also, you have immediate and direct access to the Thesaurus. Since it is activated by double clicking a word, you do have to be careful with those double clicks.
by Firefox user 17795909, 2024-03-13
Add-on safety
Risk impact
The Free Dictionary requires some sensitive permissions that could impact your browser and data security. 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.
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Risk likelihood
The Free 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.
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Upgrade to see full risk analysis details
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