I get a static image in firefox - https://github.githubassets.com/images/modules/site/home/globe-700.jpg https://github.githubassets.com/images/modules/site/hom

I get a static image in firefox - https://github.githubassets.com/images/modules/site/home/globe-700.jpg https://github.githubassets.com/images/modules/site/home/glo... I get terribly jittery rendering in chrome (despite being on a powerful desktop that is doing nothing else).