Stylesheet suddenly being imported as firebase js?

Hi

Between deployments, my .css file went from being called as <link href='https://d33wubrfki0l68.cloudfront.net/css/b08442065c3a4dec756f0aa3acaf929d4955cd21/style.e0bb4923.css' rel='stylesheet'/> to <link href='https://d33wubrfki0l68.cloudfront.net/js/adc83b19e793491b1c6ea0fd8b46cd9f32e592fc/__/firebase/init.js' rel='stylesheet'/>

I have no idea why or how come.
Any tips/ideas? please?

what site are you referring to?