This set of user images currently include animated images that are too large to be included. geo5 is the main culprit.
Alternatives
1. include all user images but geo5
2. only include stills for geometry set
3. re-design geometry set so it compress to APNG format better
4. use SVG format when supported as user icons by future version of chrome
Comment 1 by elizabethchiu@chromium.org
, Oct 12 2017