Facebook mobile site
How comes on Opera, I get a slightly different mobile site, of face-book to that on Internet Explorer/Edge/Maxathon? They are both same address. The Opera version is layered out slightly different. Plus some of the drop down options are missing. If you press more, you can't turn notifications on/ff, or un follow post?
Web developers make different versions per browser. Opera Mini is a client/server browser which brings in certain limitations for webmasters, this is probably the case here.