UserStyle to hide Facebook navigation bar

nav_hide.css

/* ==UserStyle==
@name           Facebook Navigation Hide
@namespace      github.com/openstyles/stylus
@version        1.0.0
@description    Hides Facebook navigation bar
@author         You
@match          *://www.facebook.com/*
@license        MIT
==/UserStyle== */

@-moz-document domain("facebook.com") {
    /* Hide navigation */
    div[aria-label="Facebook"][role="navigation"] {
        display: none !important;
    }
}