Power Thesaurus

Name: Power Thesaurus
Rating: 4.7742 (62 reviews)
Author: Power Thesaurus

By: Power Thesaurus

Use the power of synonyms by button in toolbar, right-click or by word selection on any page.

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Features & Capabilities

Power Thesaurus is a top-rated thesaurus extension for writers, offering instant access to synonyms, antonyms, and definitions. Use the toolbar to search, select a word on any page for on-page lookups, or right-click to access the full Power Thesaurus experience from the context menu.

Pro features unlock unlimited browsing, custom word-priority, and advanced part-of-speech filters. Configure quick toolbar, tailor results to your needs, and choose themes. Privacy-conscious: only search queries and login data are processed; your personal browsing history is not collected.

User Growth & Download Statistics

Add-on Writing AI Content

By:

Daily users:

Rating:

Version:

4.5.1 Last updated: 2026-04-23

Version code:

6215825

Creation date:

2016-04-15

Risk:

Permissions:

Host permissions:

<all_urls>

Content scripts matches:

*.powerthesaurus.org
<all_urls>

Size:

4.22MB

Email:

fi*****@powerthesaurus.org

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 932 ▼ 7

Other rankings

#7 in Language Support

#14 in Social & Communication

#1 in power keyword 39

#1 in thesaurus keyword 24

#6 in benefit keyword 10 ▼ 1

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Other platforms

Power Thesaurus (v4.5.3)

100,000 4.49

(488)

Power Thesaurus (v2.12.0)

602,455 4.74

(7,074)

Power Thesaurus (v2.12.0)

4.80

(2,981)

Power Thesaurus (v4.5.3)

27,608 4.90

(24)

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:

Power Thesaurus

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/power-thesaurus/

Email:

fi*****@powerthesaurus.org

Website:

https://www.powerthesaurus.org/

Permission Change History

2024-10-29: Version 3.0.15 → 4.2.3

Add Host permissions: <all_urls>

Add Permissions: scripting activeTab clipboardWrite

User Reviews

Overall, reviewers praise its simple, elegant design and practicality. It’s viewed as a handy tool for reading and writing, quickly providing definitions, synonyms, and antonyms by highlighting a word. The right-click thesaurus and the inclusion of rhyming words are frequently cited benefits that help editing and expression. The extension is described as smooth to use with few issues. A minority mention occasional display glitches or compatibility quirks with other extensions, but such reports are not widespread. Overall, strong positive sentiment with only minor caveats.

Pros

Simple and elegant, yet highly effective.
Handy tool for reading, definitions, and synonyms; helps non-native speakers express themselves.
Highlighting a word instantly reveals synonyms, antonyms, and definitions; saves time.
Smooth operation that boosts writing/editing productivity.
Right-click thesaurus feature with rhyming words adds value.

Cons

Recent reviews

by Mi*****, 2026-06-09

by Th*****, 2026-04-25

A superb and invaluable tool, I am very grateful to the Developer for this, Thank you.

by Fi*****, 2026-04-11

View all user reviews ›

Is Power Thesaurus 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.

Power Thesaurus 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.
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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.

Power Thesaurus 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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