Don’t tell me its not possible cause some were still using animated gifs on their header and bg! They just wont tell their secret. I got my icon gif but I wanna do the same on my background and header.
please tell atleast how to upload animated gif as ur icon i.e.dp ?? on twitter
use this >> http://twitter.com/welcome/profile
it works for me to use a gif for my icon :)
P.S. it may require to upload a gif twice :/
One word of advice - it might make your Twitter page a little bit too noisy. Animated GIFs tend to get annoying pretty fast and you might be alienating followers who would otherwise come to your Twitter page. (Unless of course they're using a client...)
Animated GIFs on Twitter, All You Need To Know