Mobile Safari Full Screen mode

デフォルトでは、フルスクリーンにはならないけど、ブックマークすればできる！

apple-mobile-web-app-capable
Sets whether a web application runs in full-screen mode.

Syntax
<meta name="apple-mobile-web-app-capable" content="yes">
Discussion
If content is set to yes, the web application runs in full-screen mode; otherwise, it does not. The default behavior is to use Safari to display web content.
You can determine whether a webpage is displayed in full-screen mode using the window.navigator.standalone read-only Boolean JavaScript property.