User Styles Managers

Redesign the web with Stylus, a user styles manager.

Change the appearance of websites instantly by applying a easy to use interface for changing the CSS. Preview and install styles created by users for your favorite websites.

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

A Chinese Developed Theme Manager. based on the source code of Stylish-for-Chrome 1.7.0.

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

superUserContent is a simple Firefox plugin that creates a new directory in your profile's chrome directory called userContent.css.d. You can use this directory as a runtime path for css styleshee.

Userscript's and userstyle's — simple extension to inject own JavaScript or CSS rules to any page.

Introducing Cascadea, the first custom style manager designed as a Safari App Extension and native macOS app. Cascadea makes it easy to install custom styles that change the look and feel of any website you want.