Bug 1745788: Add telemetry for situations when Firefox is running under App Translocation on macOS. r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D142109

toolkit/components/telemetry/Scalars.yaml

@@ -5927,7 +5927,7 @@ startup:
       Recorded on every run of a Firefox install on macOS, with a boolean value
       indicating whether Firefox is being run directly from .dmg without
       installing, or not.
-    expires: "99"
+    expires: "108"
     keyed: false
     kind: boolean
     notification_emails:
@@ -5941,6 +5941,26 @@ startup:
       - 'main'
     release_channel_collection: opt-out
 
+  is_run_from_app_translocated_location:
+    bug_numbers:
+      - 1745788
+    description: >
+      Recorded on every run of a Firefox install on macOS, with a boolean value
+      indicating whether Firefox is being run from an app translocated location,
+      or not. This is always false when `is_run_from_dmg` is true.
+    expires: "108"
+    keyed: false
+    kind: boolean
+    notification_emails:
+      - spohl@mozilla.com
+    operating_systems:
+      - mac
+    products:
+      - 'firefox'
+    record_in_processes:
+      - 'main'
+    release_channel_collection: opt-out
+
 script.preloader:
   mainthread_recompile:
     bug_numbers:

toolkit/xre/MacRunFromDmgUtils.mm

@@ -469,6 +469,8 @@ bool MaybeInstallAndRelaunch() {
     }
 
     Telemetry::ScalarSet(Telemetry::ScalarID::STARTUP_IS_RUN_FROM_DMG, isFromDmg);
+    Telemetry::ScalarSet(Telemetry::ScalarID::STARTUP_IS_RUN_FROM_APP_TRANSLOCATED_LOCATION,
+                         isTranslocated);
 
     if (!isFromDmg && !isTranslocated) {
       if (getenv("MOZ_INSTALLED_AND_RELAUNCHED_FROM_DMG")) {

toolkit/xre/metrics.yaml

@@ -21,17 +21,19 @@ startup:
       - privileged_install_failed
       - installed_and_relaunched
     description: >
-      The outcome after the app detected that it was running from DMG and
+      The outcome after the app detected that it was running from DMG or an app
-      should offer to install and relaunch itself.
+      translocated location and should offer to install and relaunch itself.
     metadata: &metadata
       tags:
         - "Toolkit :: Startup and Profile System"
     bugs:
       - https://bugzilla.mozilla.org/show_bug.cgi?id=1743328
       - https://bugzilla.mozilla.org/show_bug.cgi?id=1755049
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1745788
     data_reviews:
       - https://bugzilla.mozilla.org/show_bug.cgi?id=1743328#c1
     notification_emails:
       - jwatt@jwatt.org
       - mbalfanz@mozilla.com
+      - spohl@mozilla.com
     expires: 108