Stylus - Userstyles Manager
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Latest commit e8ba51f Jan 17, 2019
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.github Chore: include stylus version in the issue template (#549) Nov 8, 2018
.tx Locales (#532) Nov 3, 2018
_locales Update popup style sort after toggle. Closes #619 (#624) Jan 1, 2019
background Fix: handle editDeleteText message (#635) Jan 2, 2019
content Fix: catch syntax error (#627) Dec 29, 2018
edit Fix applies to alignment Jan 17, 2019
images/icon remove what-input, use own implementation, rebase on master Dec 13, 2017
install-usercss Support Chrome 49 (#561) Nov 30, 2018
js Revert expose iframes by default Jan 10, 2019
manage Fix: don't use null as id (#606) Dec 8, 2018
msgbox Return pointer-events to error modals Fixes #637 Jan 6, 2019
options Account for max-content bug in Chrome 49 Jan 8, 2019
popup Update popup style sort after toggle. Closes #619 (#624) Jan 1, 2019
sync Move dropbox vendors (#576) Nov 29, 2018
tools Move dropbox vendors (#576) Nov 29, 2018
vendor-overwrites Change: modify match-highlighter plugin (#578) Nov 25, 2018
vendor Update vendors Nov 30, 2018
.editorconfig Don't enforce non-native end_of_line in editorconfig Apr 18, 2017
.eslintignore refactor CSSLint Jan 7, 2018
.eslintrc Refactor the entire storage system and the section editor (#518) Nov 7, 2018
.gitattributes Locales (#532) Nov 3, 2018
.gitignore Locales (#532) Nov 3, 2018
LICENSE Adding external licenses (#424) Jul 9, 2018 no need to open issues that notify about transifex Aug 16, 2018
edit.html Support Chrome 49 (#561) Nov 30, 2018
global.css simplified font CSS Aug 20, 2018
install-usercss.html Support Chrome 49 (#561) Nov 30, 2018
manage.html Support Chrome 49 (#561) Nov 30, 2018
manifest.json Refactor: pull out content-scripts.js (#625) Dec 31, 2018
options.html Update popup style sort after toggle. Closes #619 (#624) Jan 1, 2019
package.json 1.5.2 Dec 11, 2018
popup.html Remove unnecessary code Dec 4, 2018

Stylus is a fork of Stylish for Chrome, also compatible with Firefox as a WebExtension


  • In addition to the site, styles with customizable parameters can also be installed from .user.css or .user.styl URLs (see Usercss format wiki).
  • Site styles can be discovered and previewed in the popup using inline search with screenshot thumbnails.
  • A backup feature which is compatible with other userstyles managers.
  • Configurable automatic update function for installed styles.
  • Customizable UI, optional layouts, and tweaks.
  • Two different optional code validators with user-configurable rules: CSSLint and Stylelint.
    • Both validators use Web Worker API to run in a separate background thread inside the editor tab without blocking your interaction with the code.
    • CSSLint is heavily modified compared to the effectively frozen original one and supports various CSS3 features as well as CSS4 Color and CSS Grid syntax.


  1. Chrome Web Store (or beta)
  2. Firefox add-ons
  3. Opera add-ons (see wiki for more recent version)


Style manager Style editor Popup config for usercss Popup inline search Style manager config for usercss Options



The source is hosted on GitHub and pull requests are welcome.

You can help us translate the extension on Transifex.

See our contributing page for more details.


Inherited code from the original Stylish:
Copyright © 2005-2014 Jason Barnabe

Current Stylus:
Copyright © 2017-2018 Stylus Team

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

External libraries

The licenses of external libraries used in this project or modified versions of external libraries can be found in their respective directory.