Manifest V2 Add-on
- By:
- Jan Biniok
- Daily users:
- 699,404 -1,163
- Rating:
- 4.70 (5,148)
8 new ratings
- Version:
- 5.3.3 Last updated: 2024-12-20
- Version code:
- 5861448
- Creation date:
- 2016-02-01
- Risk:
- Very high risk impact Low risk likelihood
- Permissions:
- alarms
- notifications
- tabs
- idle
- webNavigation
- webRequest
- webRequestBlocking
- unlimitedStorage
- storage
- contextMenus
- alarms
- Size:
- 1.58MB
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Browser Add-ons
- Updated:
- 21 hours ago
Ranking
# 21 ▲ 2
Other platforms
User reviews
Pros
- Allows extensive web customization through userscripts
- Large and active community providing many ready-made scripts
- Robust script management with a built-in editor featuring syntax highlighting and debugging
- Reliable performance without noticeable impact on browsing speed
- Enables users to tailor their browsing experience beyond standard settings
Cons
Recent reviews
good
by Fi*****, 2025-06-21
by Fi*****, 2025-06-21
by Fi*****, 2025-06-20
Extension safety
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.
Tampermonkey requires a lot of sensitive permissions. 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 ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
- High ****** ******* *** ********* ********* ******** ***** *** ** ********** ****** * ******** ******* *****
- Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
- Medium ****** ********** ** ******** ********** *** ********* ******* ******** ****** ******** ****** ********
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 Browser Add-ons, 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.
Tampermonkey has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- Low This extension was updated more than 6 months ago. Older versions are more likely to be stable and safe.
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** **** **** ****** ******* ********** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details
Compare add-ons
- Compare Tampermonkey vs Tampermonkey Editors
- Compare Tampermonkey vs Greasemonkey
- Compare Tampermonkey vs Violentmonkey
Similar add-ons
Here are some Firefox add-ons that are similar to Tampermonkey:

Tampermonkey Editors
Jan Biniok

Greasemonkey
Anthony Lieuallen

Violentmonkey
Gerald

Stay for Firefox
Stay Browser

Tampermonkey Box
kgd111

Stay for Browser
Stay Browser

Browser Tamer
IG

mPageControl
mahe

FireMonkey
erosman
Popular extensions / apps
Here are some popular extensions / apps that you might be interested in:
Lark Player:Music Player & MP3
Lark Player Studio - Music, MP3 & Video Player
Car Simulator 2
OppanaGames FZC LLC
SoundCloud: Play Music & Songs
SoundCloud
Video Editor & Maker - InShot
InShot Video Editor
Bolt: Request a Ride
Bolt Technology
Keepa - Amazon Price Tracker
https://keepa.com
Kami for Google Chrome™
Kami
DeepL: translate and write with AI
https://deepl.com
Audible: Audio Entertainment
Audible, Inc.
Photo Lab Picture Editor & Art
PHOTO LAB DMCC
Enhancer for YouTube™
https://www.mrfdev.com/
Adblock Ad Blocker Pro
https://adblox.org/