Bug 724297 - Firefox Sync launcher icon opens settings or Fennec main activity, not setup.

mobile/android/sync/manifests/SyncAndroidManifest_activities.xml.in

@@ -4,6 +4,7 @@
             android:screenOrientation="portrait"
             android:configChanges="orientation"
             android:windowSoftInputMode="adjustResize|stateHidden"
+            android:taskAffinity="org.mozilla.gecko.sync.setup"
             android:name="org.mozilla.gecko.sync.setup.activities.SetupSyncActivity" >
             <!-- android:configChanges: SetupSyncActivity will handle orientation changes; no longer restarts activity (default) -->
             <intent-filter>