Firebase onAuthStateChanged user returns null in next build

[stormfar]

https://github.com/zeit/next.js/blob/cadc950e2d2eea969ddabf135e9223b2c21108d6/examples/with-firebase/context/userContext.js#L12

Following the with-firebase example, userContext.js inits firebase and returns the user as expected when running in development mode with next, but when serving the output of next build, firebase inits, but user returns null. I'm using SSG for most pages, so not sure if that has some effect.

[m1m6]

Just faced same issue.

[charlie632]

Following because I'm having the same issue