For #235 - Add Glean crash count + docs.

app/src/main/java/org/mozilla/fenix/components/Analytics.kt

@@ -10,6 +10,7 @@ import android.content.Context
 import android.content.Intent
 import mozilla.components.lib.crash.CrashReporter
 import mozilla.components.lib.crash.service.CrashReporterService
+import mozilla.components.lib.crash.service.GleanCrashReporterService
 import mozilla.components.lib.crash.service.MozillaSocorroService
 import mozilla.components.lib.crash.service.SentryService
 import org.mozilla.fenix.BuildConfig
@@ -46,6 +47,8 @@ class Analytics(
             services.add(sentryService)
         }
 
+        services.add(GleanCrashReporterService(context))
+
         // The name "Fenix" here matches the product name on Socorro and is unrelated to the actual app name:
         // https://bugzilla.mozilla.org/show_bug.cgi?id=1523284
         val socorroService = MozillaSocorroService(context, appName = "Fenix")

docs/crash-reporting.md

@@ -6,6 +6,12 @@ This page documents the types of crash reporting, how the various parts interact
 
 Documentation for the specific libraries is included in the [https://github.com/mozilla-mobile/android-components/blob/master/components/lib/crash/README.md](Android Components Crash Reporting README).
 
+## Glean crash ping
+
+[Glean SDK](https://mozilla.github.io/glean/book/index.html) is a Mozilla open source telemetry library, which Firefox Preview uses to collect app telemetry. It can also collect crash counts as a labeled counter with each label corresponding to a specific type of crash (such as `native_code_crash`, `unhandled_exception`).
+
+The Glean crash ping format is documented [here](https://github.com/mozilla-mobile/android-components/blob/master/components/lib/crash/docs/metrics.md).
+
 ## Socorro
 
 [Socorro](https://wiki.mozilla.org/Socorro) is a Mozilla open source project for [crash statistics](https://crash-stats.mozilla.org/). Firefox Preview uses Socorro to track native GeckoView crashes. Crash reports contain a signature, classifications, and a number of improved fields (e.g. OS, product, version) - you can read more about what is sent in these fields in the [Socorro report documentation](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Crash_reporting/Understanding_crash_reports).