It needs to be a gif
It has to be a .gif
file format has to be .gif
First, it has to be an animated .gif
I guess everyone forgot about APNG and is still using that outdated format.
Here, guys.https://chrome.google.com/webstore/detail/apng/ehkepjiconegkhpodgoaeamnpckdbblp
Huzzah! Animated avatar.
it's funny because any half-decent browser should support it by default already