Software Alternatives, Accelerators & Startups


Dynamically load stylesheets in Firefox from plaintext files in your profile.

superUserContent Alternatives

The best superUserContent alternatives based on verified products, community votes, reviews and other factors.
Latest update:

  1. 26

    Change the appearance of websites instantly. Preview and install styles created by other users on

    Open Source

  2. 24

    Amino is a Chrome browser extension for customizing web page presentation with user CSS.

    freemium $2.99 / Monthly

  3. Powerful SaaS integration toolkit for SaaS developers - create, amplify, manage and publish native integrations from within your app with Cyclr's flexible Embedded iPaaS.

    Try for free paid Free Trial

    Try for free
  4. 20

    Styles and skins for all popular sites in the web

  5. 24

    Reduce eye strain in your browser with this extension that provides a dark theme for browsing.

    Open Source

  6. 26

    A user styles manager for the Web

  7. 24

    A user style manager for Pale Moon, Basilisk, Interlink, SeaMonkey, and other Mozilla-based software. Install styles from to change how web pages and the application look.

  8. 24


    Open Source

  9. 20

    Stylus is a userstyles editor and manager based on the source code of Stylish version 1.5.2.

    Open Source

  10. 24

    Remix the web. exclusively for macOS and Safari.

  11. 20

    Navi Live CSS Editor lets you write CSS code and view the changes simultaneously.

  12. 21

    Colorific Hair Color Salons give you amazing color at an affordable price.

  13. Modify requests, inject JavaScript and CSS into pages.

  14. User JavaScript and CSS on any website

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