favicon.svg

<svg 
  xmlns="http://www.w3.org/2000/svg" 
  xmlns:xlink="http://www.w3.org/1999/xlink"
  height="512" width="512"
  viewBox="-120 -120 240 240"
>
  <rect x="-120" y="-120"
        width="240" height="240"
        rx="40" ry="40"/>
  <use xlink:href="logo.svg#logo"/>
</svg>