# Power Thesaurus

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

Canonical page: [https://chrome-stats.com/d/power-thesaurus](https://chrome-stats.com/d/power-thesaurus)

## Overview

- **ID:** `power-thesaurus`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Power Thesaurus
- **Category:** language-support,social-communication
- **Daily users:** 6,951
- **Weekly downloads:** 192
- **Rating:** 4.79 / 5 (66 ratings)
- **Version:** 4.6.0
- **Last updated:** 2026-09-07
- **First published:** 2016-04-15
- **Size:** 4.34 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/power-thesaurus/)
- **Website:** [https://www.powerthesaurus.org/](https://www.powerthesaurus.org/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/power-thesaurus/privacy/](https://addons.mozilla.org/firefox/addon/power-thesaurus/privacy/)

## Description

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.

## Rankings

- #959 — Overall
- #7 — Language Support
- #14 — Social & Communication
- #1 — power
- #1 — thesaurus
- #5 — benefit

## Permissions and access

### Permissions

- `scripting`
- `activeTab`
- `clipboardWrite`
- `contextMenus`
- `storage`

### Host permissions

- `<all_urls>`

### Content script matches

- `*.powerthesaurus.org`
- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

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.

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Source: [Chrome-Stats](https://chrome-stats.com/d/power-thesaurus)