stylus

Stylus is a browser extension to restyle the websites via CSS themes, compatible with Chrome, Firefox, and any Chromium-based browsers. ## Highlights * No analytics/tracking - this is our foundational principle as Stylus was created solely because the original Stylish extension was sold to a Web analytics company. * Lots of themes in external galleries like [USW](https://userstyles.world/explore), [USO archive](https://uso.kkx.one/browse/categories), [greasyfork](https://greasyfork.org/en/scripts/by-site/*?language=css): * click the `Find` button in the popup UI, * click the screenshot to apply the style to the website, * click the screenshot again to uninstall the style. * [UserCSS](https://github.com/openstyles/stylus/wiki/Usercss) styles with advanced customization installable from any raw plain text URL. * Cloud sync for Dropbox, GDrive, OneDrive, or any WebDAV-compatible server. * Backup to a JSON file compatible with other userstyles managers. * Auto-update for styles, configurable in each style and globally in the options. * Lightweight content script (~10kB) in the web pages runs in about a millisecond. * Lots of options to configure UI and behavior. * Built-in editor for your own CSS themes (CSS/LESS/Stylus) that highlights problems using up-to-date linters ([Stylelint](https://stylelint.io/) and [CSSLint-mod](https://github.com/openstyles/csslint-mod)) with customizable rules. * Support for external IDE or advanced editor via the [live reload feature](https://github.com/openstyles/stylus/wiki/Writing-UserCSS#live-reload-on-the-fly-previewingwhen-developing-styles-locally-in-another-editoride) e.g. you can write SASS/SCSS by setting up a build step to produce standard CSS in a separate file that will be tracked by Stylus. ## Screenshots * Manager * Installer * Editor * Popup search * Popup config * Manager config * Options ## Releases 1. [Chrome Web Store](https://chromewebstore.google.com/detail/stylus/clngdbkpkpeebahjckkjfobafhncgmne) or [beta](https://chromewebstore.google.com/detail/stylus-beta/apmmpaebfobifelkijhaljbmpcgbjbdo)
for modern Chrome (v128+) and Chromium-based browsers like Brave, Opera, Vivaldi. 2. [Mozilla addons](https://addons.mozilla.org/firefox/addon/styl-us/) or [beta](https://github.com/openstyles/stylus/releases) (as an xpi file)
for Firefox and any Gecko-based browser. 3. [Zip file](https://github.com/openstyles/stylus/releases) with `-mv2` suffix to _load as an unpacked extension_
for older Chromium-based browsers which only support ManifestV2 version. ## Pre-release test builds (nightlies) [](https://github.com/openstyles/stylus/actions/workflows/ci.yml) 1. click a workflow entry in https://github.com/openstyles/stylus/actions/workflows/ci.yml, 2. download the file in `Artifacts` - this requires a github.com account, 3. install it, see [the instruction](https://github.com/openstyles/stylus/wiki/Install-Stylus-from-GitHub). ## Asking questions, participating, contributing * Bugs, discussions, questions, ideas, pull requests: https://github.com/openstyles/stylus * Wiki for many common tasks and questions: https://github.com/openstyles/stylus/wiki * Discord: https://discordapp.com/widget?id=379521691774353408 * Helping with translation: https://explore.transifex.com/github-7/Stylus/ * Guidelines and more info: https://github.com/openstyles/stylus/CONTRIBUTING.md ## License: [GPLv3](./LICENSE) * Copyright © 2017-2025 [Stylus Team](https://github.com/openstyles/stylus/graphs/contributors) * Copyright © 2005-2014 [Jason Barnabe]([email protected]) for the ever diminishing parts of the original [Stylish](https://github.com/stylish-userstyles/stylish/). * Licenses of modified external libraries: [vendor-overwrites](./src/vendor-overwrites).