# Tampermonkey

> Tampermonkey is the world's most popular userscript manager.

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

## Overview

- **ID:** `tampermonkey`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Jan Biniok
- **Category:** web-development,appearance,other
- **Daily users:** 793,462
- **Weekly downloads:** 16,903
- **Rating:** 4.70 / 5 (5,312 ratings)
- **Version:** 5.5.0
- **Last updated:** 2026-05-21
- **First published:** 2016-02-01
- **Size:** 1.64 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/tampermonkey/)
- **Website:** [https://tampermonkey.net/faq](https://tampermonkey.net/faq)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/tampermonkey/privacy/](https://addons.mozilla.org/firefox/addon/tampermonkey/privacy/)

## Description

Tampermonkey is the world's most popular userscript manager, boasting over 10 million weekly users. Compatible with Chrome, Microsoft Edge, Safari, Opera Next, and Firefox, it offers an intuitive interface for managing and customizing userscripts. Key features include a comprehensive overview of active scripts, an integrated editor, ZIP-based import/export with cloud support (Google Drive, Dropbox, OneDrive), automatic update checks, and synchronization across browsers and cloud storage.

The extension ensures compatibility with Greasemonkey up to version 3.x and offers experimental support for version 4.x. For users seeking the latest features, a frequently updated BETA version is also available. Tampermonkey streamlines the userscript experience, making customization and script management seamless and efficient across multiple browsers.

## Rankings

- #19 — Overall
- #16 — Web Development
- #18 — Other extensions
- #43 — Appearance
- #10 — money
- #11 — term

## Permissions and access

### Permissions

- `alarms`
- `notifications`
- `tabs`
- `idle`
- `webNavigation`
- `webRequest`
- `webRequestBlocking`
- `unlimitedStorage`
- `storage`
- `contextMenus`
- `clipboardWrite`
- `cookies`
- `contextualIdentities`
- `downloads`
- `<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 updated more than 6 months ago. Older versions are more likely to be stable and safe.

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

## Review summary

Users consistently praise Tampermonkey as a highly useful, convenient userscript manager and express overall positive sentiment. Repeated criticisms focus on it being closed‑source and somewhat complex, raising enterprise security and permission concerns; reviewers suggest open‑source alternatives.

### Pros

- Considered highly useful/essential for customizing web apps
- Seen as the most convenient/widely preferred userscript manager for Firefox
- Generally well‑liked by users (positive sentiment toward the extension)

### Cons

- Closed‑source — multiple reviewers recommend open‑source alternatives
- Perceived as complex and raising enterprise security/permission concerns

## Similar extensions and apps

- [Tampermonkey Mini](https://chrome-stats.com/d/tampermonkey-mini) — 6 users
- [Violentmonkey](https://chrome-stats.com/d/violentmonkey) — 177,816 users, 4.73 / 5
- [Tampermonkey Box](https://chrome-stats.com/d/%E6%B2%B9%E5%B0%8F%E7%8C%B4%E5%B7%A5%E5%85%B7%E7%AE%B1%E6%B2%B9%E5%B0%8F%E7%8C%B4%E5%B7%A5%E5%85%B7%E7%AE%B1-%E4%B8%8A%E7%BD%91%E7%A5%9E%E5%99%A8-%E6%B2%B9%E5%B0%8F%E7%8C%B4) — 705 users, 4.29 / 5
- [Greasemonkey](https://chrome-stats.com/d/greasemonkey) — 157,674 users, 4.19 / 5
- [ScriptCat Beta](https://chrome-stats.com/d/scriptcat-pre) — 329 users, 5.00 / 5
- [ScriptCat](https://chrome-stats.com/d/scriptcat) — 10,239 users, 4.74 / 5
- [Tampermonkey Editors](https://chrome-stats.com/d/tampermonkey-editors) — 817 users, 5.00 / 5
- [Wildmonkey](https://chrome-stats.com/d/wildmonkey) — 19 users, 3.50 / 5
- [FireMonkey](https://chrome-stats.com/d/firemonkey) — 1,808 users, 4.49 / 5
- [Epupp: Live Tamper your Web](https://chrome-stats.com/d/epupp) — 21 users, 5.00 / 5
- [Ace Script](https://chrome-stats.com/d/ace-script) — 1,075 users, 3.75 / 5
- [Miniscripts](https://chrome-stats.com/d/miniscripts)

---

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