I'm not sure what I need to modify in this SVG in order to make it compatible with Firefox? The animation works fine in other browsers but in Firefox it's just a static image and it does not animate.
<svg width='360px' height='360px' xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid" class="uil-balls">
<rect x="0" y="0" width="100" height="100" fill="none" class="bk"></rect>
<g transform="rotate(0 50 50)">
<circle r="3" cx="30" cy="50">
<animateTransform attributeName="transform" type="translate" begin="0s" repeatCount="indefinite" dur=".75s" values="0 0;13.819660112501051 -19.02113032590307" keyTimes="0;1" />
<animate attributeName="fill" dur=".75s" begin="0s" repeatCount="indefinite" keyTimes="0;1" values="#DB3341;#42a3cf" />
</circle>
</g>
<g transform="rotate(72 50 50)">
<circle r="3" cx="30" cy="50">
<animateTransform attributeName="transform" type="translate" begin="0s" repeatCount="indefinite" dur=".75s" values="0 0;13.819660112501051 -19.02113032590307" keyTimes="0;1" />
<animate attributeName="fill" dur=".75s" begin="0s" repeatCount="indefinite" keyTimes="0;1" values="#42a3cf;#76478a" />
</circle>
</g>
<g transform="rotate(144 50 50)">
<circle r="3" cx="30" cy="50">
<animateTransform attributeName="transform" type="translate" begin="0s" repeatCount="indefinite" dur=".75s" values="0 0;13.819660112501051 -19.02113032590307" keyTimes="0;1" />
<animate attributeName="fill" dur=".75s" begin="0s" repeatCount="indefinite" keyTimes="0;1" values="#76478a;#99c763" />
</circle>
</g>
<g transform="rotate(216 50 50)">
<circle r="3" cx="30" cy="50">
<animateTransform attributeName="transform" type="translate" begin="0s" repeatCount="indefinite" dur=".75s" values="0 0;13.819660112501051 -19.02113032590307" keyTimes="0;1" />
<animate attributeName="fill" dur=".75s" begin="0s" repeatCount="indefinite" keyTimes="0;1" values="#99c763;#ebbc3c" />
</circle>
</g>
<g transform="rotate(288 50 50)">
<circle r="3" cx="30" cy="50">
<animateTransform attributeName="transform" type="translate" begin="0s" repeatCount="indefinite" dur=".75s" values="0 0;13.819660112501051 -19.02113032590307" keyTimes="0;1" />
<animate attributeName="fill" dur=".75s" begin="0s" repeatCount="indefinite" keyTimes="0;1" values="#ebbc3c;#DB3341" />
</circle>
</g>
<circle r="6" cx="50" cy="50" stroke="black" fill="none" stroke-width="2.75"></circle>
</svg>