The preference browser.urlbar.trimURLs controls whether the protocol http and the trailing slash behind domain name (if the open page is exactly the domain name) are hidden.
booleantruetrue (default)/) behind the top level domain will be hidden. If the address starts with http:// and neither starts with a ftp. subdomain nor contains @ (usually for ftp login information), the http:// prefix will be hidden.https://www.example.org/ becomes https://www.example.org, http://www.example.org/foobar becomes www.example.org/foobar and http://ftp.example.org/foobar remains unchanged.false