Storefronts experienced intermittent errors with 503 status due to Firebase Hosting outage. We registered some stores dropping and returning few times in the period between 06:50 and 07:53 (Brasília UTC-3), exactly outage periods may vary by store (Firebase app). Firebase incident detailed here https://status.firebase.google.com/incidents/CwDdn12D5GF6nXewEvUu