title: Windows Phone WebBrowser Styling Support vh
body: <p>I tried to embed a WebBrowser Control in my apps and open a page with style <code>font-size: 3vh;</code>
  It seems the webbrowser cannot recognize the tag and the font becomes very big (but it's normal when view in IE in WP)
  May I ask if WP webbrowser does not support <code>vh</code>?</p>
  
  <p>Also, when we want to set background image for a div, it seems the "cover" style cannot cover the background and the content "overflows" <img src="https://i.stack.imgur.com/MDy4C.png" alt="enter image description here"></p>