# Violentmonkey

> Userscript support for browsers, open source.

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

## Overview

- **ID:** `violentmonkey`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Gerald
- **Category:** web-development
- **Daily users:** 176,631
- **Weekly downloads:** 9,441
- **Rating:** 4.73 / 5 (799 ratings)
- **Version:** 2.48.0
- **Last updated:** 2026-09-03
- **First published:** 2017-03-21
- **Size:** 673 KB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/violentmonkey/)
- **Website:** [https://github.com/violentmonkey/violentmonkey](https://github.com/violentmonkey/violentmonkey)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/violentmonkey/privacy/](https://addons.mozilla.org/firefox/addon/violentmonkey/privacy/)

## Description

Violentmonkey is an open-source userscript manager for browsers. It supports Greasemonkey and Tampermonkey scripts, automatically updates them based on their metadata, and preserves the execution order. It also provides GM functions for advanced users and easy import/export via ZIP.

Additionally, Violentmonkey offers cloud synchronization with Dropbox, OneDrive, Google Drive, and WebDAV so your scripts follow you across devices. Open-source with an actively maintained beta version to test updates and new features.

## Rankings

- #98 — Overall
- #17 — Web Development
- #12 — money
- #31 — support
- #38 — keyword
- #68 — source

## Permissions and access

### Permissions

- `tabs`
- `<all_urls>`
- `webRequest`
- `webRequestBlocking`
- `notifications`
- `storage`
- `unlimitedStorage`
- `clipboardWrite`
- `contextMenus`
- `cookies`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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

Violentmonkey is widely praised as an open-source, privacy-conscious, and Firefox-optimized userscript manager that is easy to use and lightweight. Users appreciate its script management and customization capabilities. However, the most consistently mentioned drawback is sync reliability, including instances of script data being deleted or corrupted during syncing. Overall, it offers strong value for Firefox users who want control over their scripts, but users should back up data due to sync risks.

### Pros

- Open-source with a clear privacy stance
- Easy to install, manage and run user scripts
- Lightweight and fast – no bloat or slowdowns
- Strong Firefox optimization and overall browser performance
- Good for personalizing and enhancing websites through scripts

### Cons

- Sync reliability issues: script data can be lost or corrupted during synchronization

## Similar extensions and apps

- [Wildmonkey](https://chrome-stats.com/d/wildmonkey) — 19 users, 3.50 / 5
- [Tampermonkey](https://chrome-stats.com/d/tampermonkey) — 786,881 users, 4.70 / 5
- [ScriptCat](https://chrome-stats.com/d/scriptcat) — 10,006 users, 4.74 / 5
- [ScriptCat Beta](https://chrome-stats.com/d/scriptcat-pre) — 325 users, 5.00 / 5
- [Purplemonkey2](https://chrome-stats.com/d/purplemonkey2) — 28 users, 3.00 / 5
- [FireMonkey](https://chrome-stats.com/d/firemonkey) — 1,791 users, 4.49 / 5
- [Greasemonkey](https://chrome-stats.com/d/greasemonkey) — 156,466 users, 4.19 / 5
- [Tampermonkey Editors](https://chrome-stats.com/d/tampermonkey-editors) — 812 users, 5.00 / 5
- [Magic Userscript+](https://chrome-stats.com/d/userscript-plus) — 690 users, 4.28 / 5
- [Oildrop](https://chrome-stats.com/d/oildrop) — 1 users, 5.00 / 5
- [Ace Script](https://chrome-stats.com/d/ace-script) — 1,067 users, 3.75 / 5
- [usi (User|Unified Script Injector)](https://chrome-stats.com/d/userunified-script-injector) — 46 users, 3.88 / 5

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