[SVG scale transformOrigin bug in Firefox]

 

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I was attempting to rotate a simple cog svg graphic around its centre point using a CSS transition. I had the same problem as you with Firefox; transform-origin seemed to have no effect.

The solution was to draw the original svg shape so that its centre was at coordinate 0, 0:

<svg x="0px" y="0px" width="400px" height="400px" viewBox="0 0 400 400">
<rect id="myObject" x="-50" y="-50" fill="#E52420" width="100" height="100"/>
</svg>

Then add a group around it and translate to the position you want:

<svg x="0px" y="0px" width="400px" height="400px" viewBox="0 0 400 400">
<g transform="translate(150, 100)">
<rect id="myObject" x="-50" y="-50" fill="#E52420" width="100" height="100"/>
</g>
</svg>

Now you can apply css transitions that should work in Firefox (I add a class to the HTML tag using JavaScript based on a user action (js-rotateObject) and use Minimizr to check that the browser can handle transforms and transitions (.csstransforms.csstransitions):

#myObject{
transform: rotate(0deg);
transition: all 1s linear;
}

.csstransforms.csstransitions.js-rotateObject #myObject{
transform: rotate(360deg);
}