Also, you guys were asking about Firefox support so I did a deep dive and we're ready go to but Google Firebase doesn't support the moz-extension URL scheme. J

Also, you guys were asking about Firefox support so I did a deep dive and we're ready go to but Google Firebase doesn't support the moz-extension URL scheme. Just the chrome-extension scheme. I added a feature request for them to support chrome-extension here: https://github.com/firebase/firebase-js-sdk/issues/4002 https://github.com/firebase/firebase-js-sdk/issues/4002 I'm going to submit a PR to them to support moz-extension too.