title: Can't install APK from browser downloads
body: <p>I've downloaded an APK from web, using the default browser and it can't be opened from the Browser -> Downloads.</p>
  
  <p>It tells me "Can't open file"</p>
  
  <p>But I can use a file browser (like OI File Browser) to browse and open this APK, and it works well.</p>
  
  <p>What could be the problem here? Is it about the HTTP header? </p>