UC:
<meta name="full-screen" content="yes">
<meta name="browsermode" content="application">
QQ:
<meta name="x5-orientation" content="portrait">
<meta name="x5-fullscreen" content="true">
<meta name="x5-page-mode" content="app">
2015-03-20——移动端UC浏览器、QQ浏览器自动全屏
原文：http://www.cnblogs.com/bugong/p/4352801.html