Merge pull request #278 from mozilla/record-incompat-addons-event-272

fix #272: add event telemetry for incompat addons

docs/metrics.md

@@ -169,6 +169,15 @@ of a `testpilottest` telemetry ping for each scenario.
   }
 ```
 
+* When a user encounters the disabled "move" feature because of incompatible add-ons
+
+```js
+  {
+    "uuid": <uuid>,
+    "event": "incompatible-addons-detected"
+  }
+```
+
 ### A Redshift schema for the payload:
 
 ```lua

index.js

@@ -505,7 +505,13 @@ const ContainerService = {
     return new Promise(resolve => {
       AddonManager.getAddonsByIDs(INCOMPATIBLE_ADDON_IDS, (addons) => {
         addons = addons.filter((a) => a && a.isActive);
-        resolve(addons.length !== 0);
+        const incompatibleAddons = addons.length !== 0;
+        if (incompatibleAddons) {
+          this.sendTelemetryPayload({
+            "event": "incompatible-addons-detected"
+          });
+        }
+        resolve(incompatibleAddons);
       });
     });
   },