Ace Script

Ace Script

User Script Manager with the support of Ace Stream technologies

Ace Script promo image
What is Ace Script?

Ace Script is a Firefox add-on serving as a User Script Manager integrated with Ace Stream technology. It significantly elevates the web page customization experience by supporting userscripts for Greasemonkey and Tampermonkey. By integrating Ace Stream software functionality, one can enhance their favorite sites optimally. Additionally, users can create their own scripts or utilize ready-to-use ones from various platforms like or

Stats date:
Users: 1,585 ▲ 18
Rating: 3.73 (66)
Version: 1.2.1 (Last updated: 2023-09-13)
Creation date: 2015-10-20
Weekly download count: 54
Firefox on Android: Yes
Manifest version: 2
  • tabs
  • <all_urls>
  • webRequest
  • webRequestBlocking
  • notifications
  • storage
  • unlimitedStorage
  • clipboardWrite
  • contextMenus
  • nativeMessaging
  • See more
Size: 545.14K
Email: Click to see
Risk impact: Very high risk impact
Risk likelihood: Moderate risk likelihood

Other platforms

Ace Script
Ace Script (v1.2.5)
3.40 (730) 981,646
Not available on Edge

Allows you to customize the way a web page displays or behaves by using userscripts, similarly to Greasemonkey.

Supports userscripts for Greasemonkey and Tampermonkey, and also allows you to create scripts with the ability to easily integrate the functionality of the Ace Stream software (, to improve your favorite sites.

You can write your own scripts or use existing ones. You can find ready to use scripts on these sites:

Attention! This extension does not contain any ads and does not automatically modify web pages. Any changes and modifications on the sites are done only by the scripts you install by yourself. Therefore, please install only scripts that you trust. If you detect incorrect work of the scripts you have added, immediately delete them.

Developer's site: Source code: Privacy policy:

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.
      Most mentioned
      • Ace Script de Ace Stream
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      Risk impact

      Ace Script is not very risky to use and it requires a lot of sensitive permissions. Avoid installing this add-on unless you absolutely trust this publisher.

      Risk likelihood

      Ace Script is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

      Upgrade to see risk analysis details