UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10718.88.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.118 Safari/537.36
Platform: 10718.88.2 (Official Build) stable-channel snappy

Steps to reproduce the problem:
1. Download a GIF from the internet
2. Open Profile picture settings
3. Rename to *.jpg as images in *.gif format won't even display in selection menu. 

What is the expected behavior?
Since there already is a choice of a few pre-installed animated profile pictures, I would expect for GIFs to work as well.

What went wrong?
Only the first frame of the GIF is displayed  as the profile picture.

Did this work before? Yes I have no idea which version it was, but have seen people setting GIFs as profile pictures in the past.

Chrome version: 68.0.3440.118  Channel: stable
OS Version: 10718.88.2
Flash Version: 30.0.0.134

This video shows someone setting a GIF as their profile picture: https://www.youtube.com/watch?v=jIMhiiqfyNQ