Tampermonkey

Tampermonkey is the world's most popular userscript manager.

Tampermonkey: The Most Popular Userscript Manager

Tampermonkey is an exceptional userscript manager with over 10 million weekly users. Available for several browsers, it provides an easy way to manage scripts, including features like overview of running scripts, built-in editor, ZIP-based import and export, automatic update checks, synchronization, and Greasemonkey compatibility. A BETA version with frequent updates is also available.
Download
View on Firefox Browser Add-ons

Add-on stats

Manifest V2
Daily users: 770,706
5.11K
Rating: 4.70
(5,038)
10 new ratings
Version: 5.3.3 (Last updated: 2024-12-20)
Version code: 5861448
Creation date: 2016-02-01
Weekly download count: 20,122
Firefox on Android: Yes
Permissions:
  • alarms
  • notifications
  • tabs
  • idle
  • webNavigation
  • webRequest
  • webRequestBlocking
  • unlimitedStorage
  • storage
  • contextMenus
    • See more
Size: 1.65M
Full description: See detailed description

Ranking

# 22 ▲ 1
Other rankings
Upgrade to see more rankings

Other platforms

Tampermonkey (v5.3.3)
11,000,000 4.73 (72,093)
Not available on Android
Not available on Edge

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Highly customizable pages
  • Works well with Stylus
Cons
    Most mentioned
    • Customization options
    User reviews
    by Firefox user 18872212, 2025-03-08
    by mj, 2025-03-07
    by aa, 2025-03-07
    View all user reviews

    Add-on safety

    Risk impact

    Tampermonkey 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.
    • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
    • High ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
    • High ****** ******* *** ********* ********* ******** ***** *** ** ********** ****** * ******** ******* *****
    • Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
    • Medium ****** ********** ** ******** ********** *** ********* ******* ******** ****** ******** ****** ********
    • Low ******* ****** ** *** ********* ********
    Risk likelihood

    We don't have sufficient data to confidently determine the risk likelihood of Tampermonkey. Use it at your own risk.

    Risk likelihood analysis details
    • Medium This extension was updated in the past 3 months. New updates may not be stable or safe.
    • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
    • Low **** ********* *** **** **** ****** ******* ********** **** ****** ** ** ****** *** *****
    • Good **** ********* *** **** **** *******
    Upgrade to see full risk analysis details