Personal userChrome.css, userContent.css and user.js customization for Firefox 109 and newer, targeting more minimal user-interface and reduces on-boarding messages and tweaks Firefox's scrolling behaviour.
Firefox on Windows with pinceau
Firefox on macOS with pinceau
Download a pre-built pinceau.zip package, extract it and copy the contents to your Firefox profile's root directory.
Tip: You can open about:profiles page in Firefox to find
your profile root directory location.
For building, customization and development instructions, see CONTRIBUTING.md.