Merlin
Greasemonkey

Greasemonkey

Customize the way a web page displays or behaves, by using small bits of JavaScript.

What is Greasemonkey?
Greasemonkey is an advanced Firefox add-on that provides users the opportunity to personalize how a webpage displays or functions. Through scripting small JavaScript snippets, users can modify internet pages, create personalized site scripts, or use existing ones. It also provides a platform for troubleshooting and script hosting.
Download
Merlin
Stats
Version: 4.12.0 (Last updated: 2023-12-18)
Creation date: 2005-05-20
Weekly download count: 3,627
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
  • <all_urls>
  • clipboardWrite
  • cookies
  • downloads
  • notifications
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
  • webRequest
    • See more
Size: 630.29K
URLs: Website
Stats date:

Chrome-Stats Rank

# 117 ▼ 1
Other rankings
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Other platforms

Not available on Chrome
Not available on Edge
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Chrome-Stats extension
Merlin
Summary
Analyze keywords

Allows you to customize the way a web page displays or behaves, by using small bits of JavaScript.

You can write your own scripts, too. Check out http://wiki.greasespot.net/ to get started. Many scripts already exist, probably ones to enhance your favorite sites. Find them at http://wiki.greasespot.net/User_Script_Hosting .

Having trouble? Please don't post comments here, nobody will see them. If you need help, please read: http://wiki.greasespot.net/Greasemonkey_Manual:Getting_Help

User reviews
User reviews summary
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
  • Useful for managing and enhancing browser functions
  • Can be used for script writing and surveillance
Cons
  • Lack of updates and compatibility issues with newer Firefox versions
  • Broken UI on some Firefox versions
Most mentioned
  • Lack of updates affecting functionality
  • Compatibility issues with newer Firefox versions
Recent reviews
by mrbruno, 2024-04-24
by mrbruno, 2024-04-24
by Goto, 2024-04-08
View all user reviews
Safety
Risk impact

Greasemonkey is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Greasemonkey if you trust the publisher.

Risk likelihood

Greasemonkey has earned a fairly good reputation and likely can be trusted.

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Screenshots
Greasemonkey Greasemonkey