Also see: https://lichess.org/page/extend
- Install stylus in your browser: https://github.com/openstyles/stylus#releases
- Open one of the
.user.css
files in this repository, for example https://github.com/ornicar/userstyles/blob/master/lichess.streamer.user.css - Click the
Raw
button - Click
Install style
You can then managed the enabled styles from the stylus extension icon in your browser.