sousa-gecko/toolkit/components/telemetry/docs/data/first-shutdown-ping.md

"first-shutdown" ping

This ping is a duplicate of the main-ping sent on first shutdown. Enabling pingsender for first sessions will impact existing engagement metrics. The first-shutdown ping enables a more accurate view of users that churn after the first session. This ping exists as a stopgap until existing metrics are re-evaluated, allowing us to use the first session main-pings directly.

See {doc}main-ping for details about this payload.