Here is an existing poly fill (I have not reviewed or tested this. I got it from the caniuse site) https://github.com/davidmz/apng-canvas https://github.com/da

Here is an existing poly fill (I have not reviewed or tested this. I got it from the caniuse site) https://github.com/davidmz/apng-canvas https://github.com/davidmz/apng-canvas