Zren

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
@namespace html url("http://www.w3.org/1999/xhtml");

/*
** In order for userChrome.css to work, you need to open `about:config` and change
** `toolkit.legacyUserProfileCustomizations.stylesheets` to `true`.
*/