Attention style authors and the userstyle community:
Check out: https://userstyles.world/
You've asked for an alternative, this is a great one! Free and open-source, a community-driven platform for sharing and browsing UserCSS userstyles, and a replacement for UserStyles.org, made by the userstyles community.
Stylish 1.0.3 beta
- Fixed a bug where Stylish would give an error when you were on "weird" websites like chrome URLs.
- New injected attributes for styling - stylish-platform, stylish-application, stylish-application-version.
- New preference extensions.stylish.dbFile to put your stylish DB file in a different location.
- Support for Firefox 3.6a1.
- Fixed a bug where the Preview button would have no effect.
- Fixed a bug where you could input duplicate tags.