# Firefox and its derivatives This module supports [Firefox](https://www.mozilla.org/firefox/), in addition to [Floorp](https://floorp.app/) and [LibreWolf](https://librewolf.net/), which are Firefox derivatives. The same implementation is shared between all of these browsers, but they don't share option values. > [!IMPORTANT] > > For any theming to be applied, you need to tell this module which > [profiles](https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data) > you're using: > > ```nix > { > programs.firefox = { > enable = true; > > profiles = { > my-profile = { > # bookmarks, extensions, search engines... > }; > my-friends-profile = { > # bookmarks, extensions, search engines... > }; > }; > }; > > stylix.targets.firefox.profileNames = [ "my-profile" "my-friends-profile" ]; > } > ``` > > This is necessary due to a limitation of the module system: we can either > detect the list of profiles, or change their configuration, but we can't do > both without infinite recursion.