Line - Minimal - Firefox Theme For Stylish by wiiija on DeviantArt

Stylish-Custom :: Add-ons for Firefox

This popular Chrome and Firefox addon tracks EVERYTHING you do online

Moving User Styles (Themes) from Stylish 3.x to Stylus

Melbourne (Firefox CSS, FF 29 and above) by noha-ra on DeviantArt

Upgrading Firefox For A Single User – Peppermint OS

Stylish Browser Smartphones : Firefox OS

GitHub - JcDenton86/stylish_firefox_android_theme: An Android theme for Google pages created using Stylish Firefox add-on.

Firefox Menu discussion - mozillaZine Forums

Stylish is back, and you still shouldn't use it

Privacy Warning for anyone using Stylish for Roll20 to get Dark Mode. Stylish extension has been found to be stealing internet history of its 2 million users automatically without full consent.