Facebook will require ALL applications and page tabs to support HTTPS secure hosting

Integrate your site with Facebook Page

You can easily create a Shop tab on your Facebook page. To enable Facebook compatibility mode you need to add an extra “headless” parameter to your site’s URL, eg: https://yoursite.com/shop/?headless=1.

Custom Shop Page

You can create a custom shop page for facebook, and set it as Facebook Tab homepage, eg: https://yoursite.com/my-facebook-home-page?headless=1

Custom Menu

In Appearance > Menus you can also create a separate menu for your Facebook shop tab.