title: Why do no browsers apart from Firefox support animated PNGs?
body: <p>When I look into the list (<a href="http://caniuse.com/apng" rel="nofollow noreferrer">http://caniuse.com/apng</a>) of supported browser on animated PNG, I found that basically only Firefox support it. All the other major browsers don't support. Even the Opera which they once support it and they drop it on newer release.</p>
  
  <p>I always thinking animated PNG is nice. But why is most browsers don't support it? What is the reason they not support?</p>