I installed the Superfish Module and Library and it works on a desktop/laptop/tablet. It collapses correctly when I re-size the screen. But it won't display at all on a mobile device. I tried different settings on the Config page and tried adding the recommended code in html.tpl.php: meta name="viewport" content="width=device-width, initial-scale=1.0" I enabled SF-Smallscreen with the jQuery sf-Smallscreen plugin. Made sure it was weighted to appear at the top of all the blocks. Still no luck.