Hi, the fix after looking at the data is not what we wanted. We want the ping added to the first session ping but what you have done is add "first_session.install_source" to metrics ping. This means if a client does not report a metric ping, we will not be able to see the install source which is reason why wanted this to be part of the first session ping in the first place.
Bug 1898363 Comment 14 Edit History
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Hi, the fix after looking at the data is not what we wanted. We want the ping added to the first session ping but what you have done is add "first_session.install_source" to metrics ping. This means if a client does not report a metric ping, we will not be able to see the install source which is reason why wanted this to be part of the first session ping in the first place. The correct solution will add install source to https://dictionary.telemetry.mozilla.org/apps/fenix/pings/first-session