# Firefox

## userChrome

1. Set `toolkit.legacyUserProfileCustomizations.stylesheets` to `true` with `about:config`
1. Locate profile with `about:profiles`
1. Copy `firefox/userChrome.css` to `{Root Directory}/chrome/userChrome.css`
1. Customize interface

## userStyles

Styles can be applied using the [CSS Override extension](https://github.com/swcolegrove/css-override-web-extension).