title: Rotating SVG mask
body: <p>I'm struggling to find a way to rotate this SVG mask so that it rotates from within the center. In other words, I'm aiming for a spinning effect that will be on infinite loop. Also, I can't figure out why it will not rotate in Firefox. Any ideas? </p>
  
  <p>Here's the <a href="https://jsfiddle.net/wbhood24/0ojspoc8/" rel="nofollow">JSFiddle</a> </p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;body class="home"&gt;
    &lt;svg preserveAspectRatio="xMidYMid slice"&gt;
      &lt;svg version="1.1" id="first-ring" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
       width="100%" height="100%"  xml:space="preserve"&gt;
        &lt;mask id="mask" maskUnits="userSpaceOnUse"&gt;
          &lt;rect x="0" y="0" width="100%" height="100%"/&gt;
            &lt;svg version="1.1" baseProfile="tiny" class="first-ring" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
               x="0px" y="0px" viewBox="0 0 241.5 242" xml:space="preserve"&gt;
              &lt;g class ="first-ring-path"&gt;
                &lt;g&gt;
                  &lt;g&gt;
                    &lt;path  d="M118.4,237.5c-8.5,0-16.9-0.9-25.1-2.7c-2.8-0.6-4.6-3.4-3.9-6.2c0.6-2.8,3.4-4.5,6.2-3.9
                    c7.5,1.6,15.2,2.5,22.9,2.5c20.7,0,40.7-6,58-17.3c2.4-1.6,5.6-0.9,7.2,1.5c1.6,2.4,0.9,5.6-1.5,7.2
                    C163.1,230.9,141.1,237.5,118.4,237.5z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path   d="M192.5,209.2c-1.4,0-2.8-0.6-3.9-1.7c-1.9-2.1-1.7-5.4,0.4-7.3c3.9-3.5,7.5-7.3,10.9-11.3
                    c1.8-2.2,5.1-2.5,7.3-0.7s2.5,5.1,0.7,7.3c-3.6,4.4-7.7,8.6-11.9,12.4C195,208.7,193.7,209.2,192.5,209.2z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path  d="M214.6,181.9c-0.9,0-1.8-0.2-2.6-0.7c-2.5-1.4-3.3-4.6-1.9-7.1c9.3-16,14.1-34.3,14.1-52.9
                    c0-4.9-0.3-9.8-1-14.5c-0.4-2.8,1.6-5.4,4.4-5.8c2.8-0.4,5.4,1.6,5.8,4.4c0.7,5.2,1.1,10.6,1.1,15.9c0,20.4-5.4,40.5-15.5,58.1
                    C218.1,181,216.4,181.9,214.6,181.9z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path  d="M224.7,94.1c-2.2,0-4.3-1.4-4.9-3.7c-2.3-7.7-5.6-15.1-9.6-22.1c-1.4-2.5-0.6-5.6,1.9-7.1
                    c2.5-1.4,5.6-0.6,7.1,1.9c4.4,7.7,8,15.8,10.5,24.2c0.8,2.7-0.7,5.6-3.4,6.4C225.7,94,225.2,94.1,224.7,94.1z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path  d="M206.4,58.7c-1.5,0-3.1-0.7-4.1-2c-10.9-14.2-25.3-25.4-41.7-32.5c-2.6-1.1-3.8-4.2-2.7-6.8
                    s4.2-3.8,6.8-2.7c17.9,7.8,33.7,20.2,45.7,35.7c1.7,2.3,1.3,5.5-0.9,7.2C208.6,58.3,207.5,58.7,206.4,58.7z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path  d="M41,46.7c-1.3,0-2.7-0.5-3.7-1.6c-2-2-1.9-5.3,0.1-7.3C59.2,16.6,88,5,118.4,5c1.6,0,3.2,0,4.7,0.1
                    c2.9,0.1,5.1,2.5,5,5.4c-0.1,2.9-2.5,5.1-5.4,5c-1.4-0.1-2.9-0.1-4.3-0.1c-27.7,0-53.9,10.6-73.7,29.9
                    C43.6,46.2,42.3,46.7,41,46.7z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path  d="M7.5,119c-0.1,0-0.2,0-0.4,0c-2.8-0.2-5-2.7-4.8-5.5c0.3-4,0.8-8.1,1.5-12.1C6,88.3,10.5,75.7,17,64.2
                    c1.4-2.5,4.6-3.4,7-2c2.5,1.4,3.4,4.6,2,7c-5.9,10.5-10,21.9-12.1,33.9c-0.6,3.6-1.1,7.4-1.3,11C12.4,116.9,10.2,119,7.5,119z"/&gt;
                  &lt;/g&gt;
                  &lt;g&gt;
                    &lt;path  d="M58.6,220c-1,0-1.9-0.3-2.8-0.8c-26.2-16.7-44.8-43.7-51.2-74c-0.6-2.8,1.2-5.5,4-6.1s5.5,1.2,6.1,4
                    c5.8,27.6,22.8,52.1,46.6,67.4c2.4,1.5,3.1,4.7,1.6,7.1C61.9,219.2,60.3,220,58.6,220z"/&gt;
                  &lt;/g&gt;
                &lt;/g&gt;
              &lt;/g&gt;
            &lt;/svg&gt;
          &lt;/mask&gt;
      &lt;/svg&gt;
      &lt;rect id="rect" mask="url(#mask)" x="0" y="0" width="5000px" height="5000px"/&gt;
    &lt;/svg&gt;
  &lt;/body&gt;
  </code></pre>
  
  <p>CSS:</p>
  
  <pre><code>html{
      height: 100%;
      overflow:hidden;
      font-weight:100;
  }
  body {
      height: 100%;
      overflow:hidden;
  }    
  svg  {
      width: 100%;
      height: 100%;
      overflow:hidden;
  }
  svg mask rect {
      fill: rgba(255, 255, 255, 0.6);
  }
  svg &gt; rect {
      fill: white;
      // -webkit-mask: url(#mask);
      // -moz-mask: url(#mask);
      // mask: url(#mask);
  }
  .first-ring-path{
      -moz-animation:spin 20s infinite linear;
      -webkit-animation:spin 20s infinite linear;
      animation:spin 20s infinite linear;
  }  
  @-moz-keyframes spin {
      0% { -moz-transform:rotate(0deg); }
      100% { -moz-transform:rotate(360deg); }
  }
  @-moz-keyframes spinoff {
      0% { -moz-transform:rotate(0deg); }
      100% { -moz-transform:rotate(-360deg); }
  }
  @-webkit-keyframes spin {
      0% { -webkit-transform:rotate(0deg); }
      100% { -webkit-transform:rotate(360deg); }
  }
  @-webkit-keyframes spinoff {
      0% { -webkit-transform:rotate(0deg); }
      100% { -webkit-transform:rotate(-360deg); }
  }
  </code></pre>