Firebase doc link not working - Page not found 404

The below link does not work:
https://docs.expo.io/versions/latest/guides/using-firebase/

Hmmm. It worked for me just now. Can you try on a private mode (incognito) of your browser?

Sorry I posted the wrong link: This link to the repo is broken

https://github.com/expo/expo/tree/master/packages/expo-firebase-firestore