Why the code does not work in IE and Firefox?

Works everywhere except IE and Firefox
codepen.io/anon/pen/JKEvzZ"
July 8th 19 at 12:01
2 answers
July 8th 19 at 12:03
Ubuntu 14.04
Firefox 47.0
f3edaf0c9b144ec8ba03004b8ee8a3be.png
July 8th 19 at 12:05
probably because of this

Find more questions by tags HTMLCSSAnimationSVG