Ace Script
An open source userscript manager.

Ace Script provides userscripts support for browsers.


It allows you to customize the way a web page displays or behaves by using userscripts.

  • Run userscripts in web pages
  • Support integration with Ace Stream software

Note: This extension does not contain any ads and does not modify web pages automatically. Any changes and modifications on the sites are done by installed scripts. Therefore, please install only scripts that you trust.

Supported Browsers

Ace Script is built with web extension APIs. It supports a lot of browsers, including:

  • Chrome, Opera and many other Chromium based browsers
  • Firefox


You are absolutely welcome to contribute code to GitHub.

You are welcome to help with this website too. Documents, improvements, articles about Violentmonkey, etc.


  • Greasemonkey
  • Tampermonkey