SVG images not displaying in FF

[Nikos123]

This is the game

https://quantuminformation.github.io/youtube-space-invaders/

Have I made a mistake here: 

 

<svg xmlns="http://www.w3.org/2000/svg">
  <!-- Created with Method Draw - http://github.com/duopixel/Method-Draw/ -->
  <g>
    <title>Player ship</title>

    <!--    &lt;!&ndash;ship body&ndash;&gt;
        <path d="M0 30
        L 10 10
        L 20 20
        L 30 5
        L 40 20
        L 50 10
        L 60 30
        Z"
              stroke-width="2"     stroke="#555" fill="#BBB"/>-->

    <!--canopy-->
    <path d="M11 13
    Q 15 -2, 19 13    Z" stroke="#0CF" stroke-width="2" fill="#7CF"/>

    <!--body-->
    <path d="
    M0 0
    Q 15 35 30 0
    Q 15 25 0 0"
          stroke="#5EFF34" />

    <!--outline (helpful for drawing)-->
<!--
    <path d="M0 0 H 30 V 20 H 00 L 0 0" stroke="#FFF" fill="transparent"/>
-->

  </g>
</svg>

 

[mattstyles]

 

looks good in FF from here (59.02)

Just updated to latest 61.0.1, still looking good