CSS conversion origin from center to SVG ignored in Firefox

Question

I have an svg icon built into my html that when applied, it uses a scaled css conversion. I set the transform-origin property to center / 50% in the parent group of the path *, and it works fine in Webkit but is ignored in Firefox. Any ideas?

Here is jsFiddle

HTML / SVG:

<div class="col3 build websites-content">
    <svg class="svg-icon icon-build" width="75px" height="75px">
        <g><path fill="#fff" d="M17.5,39.7L28.8,42v13.5l9.5-8.5L49,55.5l4.5-36L17.5,39.7z M35.5,42L31,48.7V42l18-18L35.5,42z"/></g>
    </svg>
</div>

CSS (ignoring vendor prefixes):

.websites-content g {
    transition: transform 0.3s ease;
    transform-origin: center center;
}

.websites-content:hover g {
    transform: scale(1.3);
}

* I have other icons containing several paths requiring groups - just using this single path for clarity

Answer 1

translate, , :

.websites-content:hover g {
 -webkit-transform: scale(1.3) translate(-8.6px, -8.6px);
 -moz-transform:    scale(1.3) translate(-8.6px, -8.6px);
 -ms-transform:     scale(1.3) translate(-8.6px, -8.6px);
  transform:        scale(1.3) translate(-8.6px, -8.6px);
}

jsfiddle