Since both of these metrics are set once per `nsNSSComponent` init ([nss_initialization here](https://searchfox.org/mozilla-central/rev/b655023a1978bcad8cc2fb038b89a058b45e91a7/security/manager/ssl/nsNSSComponent.cpp#1691), [loading_cert_tasks here](https://searchfox.org/mozilla-central/rev/b655023a1978bcad8cc2fb038b89a058b45e91a7/security/manager/ssl/nsNSSComponent.cpp#1649)), which should be at most once per application session, I think my intuition is bearing out. This would help explain why there are just so many more reports from Android: it is far more likely to have multiple app sessions per "metrics" ping on Android than on Desktop.
Bug 1927501 Comment 1 Edit History
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Since both of these metrics are set once per `nsNSSComponent` init ([nss_initialization here](https://searchfox.org/mozilla-central/rev/b655023a1978bcad8cc2fb038b89a058b45e91a7/security/manager/ssl/nsNSSComponent.cpp#1691), [loading_certs_task here](https://searchfox.org/mozilla-central/rev/b655023a1978bcad8cc2fb038b89a058b45e91a7/security/manager/ssl/nsNSSComponent.cpp#1649)), which should be at most once per application session, I think my intuition is bearing out. This would help explain why there are just so many more reports from Android: it is far more likely to have multiple app sessions per "metrics" ping on Android than on Desktop.