Firebase: We are tracking a networking issue that may affect a significant part of the fleet. Devices may be unable to connect to backends that support IPv4 only (IPv6 and dual support are not affected).

Next time

Firebase is degraded. Is your product working?

An incident on their side does not always mean an outage on yours, and the only way to know is to already be watching your own endpoints. Set that up in under a minute and you will be notified the next time your own site is affected. And there will be a next time.

50 monitors for your own websites. No card.