diff --git a/docs/telemetry.md b/docs/telemetry.md
index a9585b582..8f06202ea 100644
--- a/docs/telemetry.md
+++ b/docs/telemetry.md
@@ -1,7 +1,13 @@
 # Telemetry
 
-Nightly versions of Fenix (build on Taskcluster) send a "baseline" ping to Mozilla's telemetry service.
+Fenix uses Mozilla's telemetry service (Glean) and LeanPlum to measure feature performance and engagement.
 
 ## Baseline ping
 
-Fenix crates and tries to send a "baseline" ping when the app goes to the background. This baseline ping is defined by the [Glean](https://github.com/mozilla-mobile/android-components/tree/master/components/service/glean) component and [documented in the Android Components repository](https://github.com/mozilla-mobile/android-components/blob/master/components/service/glean/docs/baseline.md).
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+Fenix creates and tries to send a "baseline" ping when the app goes to the background. This baseline ping is defined by the [Glean](https://github.com/mozilla-mobile/android-components/tree/master/components/service/glean) component and [documented in the Android Components repository](https://github.com/mozilla-mobile/android-components/blob/master/components/service/glean/docs/baseline.md).
+
+## Events
+
+| Event     | Glean Key | Leanplum Key | extras |
+|-----------|-----------|--------------|--------|
+| OpenedApp |           | E_Opened_App |        |
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