--- a/dom/push/PushService.jsm
+++ b/dom/push/PushService.jsm
@@ -291,17 +291,17 @@ var PushService = {
         if (aData == "dom.push.serverURL") {
           console.debug("observe: dom.push.serverURL changed for websocket",
                 prefs.get("serverURL"));
           this._stateChangeProcessEnqueue(_ =>
             this._changeServerURL(prefs.get("serverURL"),
                                   CHANGING_SERVICE_EVENT)
           );
 
-        } else if (aData == "dom.push.connection.enabled") {
+        } else if (aData == "dom.push.connection.enabled" || aData == "dom.push.alwaysConnect") {
           this._stateChangeProcessEnqueue(_ =>
             this._changeStateConnectionEnabledEvent(prefs.get("connection.enabled"))
           );
         }
         break;
 
       case "idle-daily":
         this._dropExpiredRegistrations().catch(error => {
@@ -496,16 +496,18 @@ var PushService = {
 
     // The offline-status-changed event is used to know
     // when to (dis)connect. It may not fire if the underlying OS changes
     // networks; in such a case we rely on timeout.
     Services.obs.addObserver(this, "network:offline-status-changed");
 
     // Used to monitor if the user wishes to disable Push.
     prefs.observe("connection.enabled", this);
+    // Used to load-test the server-side infrastructure for broadcast.
+    prefs.observe("alwaysConnect", this);
 
     // Prunes expired registrations and notifies dormant service workers.
     Services.obs.addObserver(this, "idle-daily");
 
     // Prunes registrations for sites for which the user revokes push
     // permissions.
     Services.obs.addObserver(this, "perm-changed");
   },
@@ -579,16 +581,17 @@ var PushService = {
   _stopObservers: function() {
     console.debug("stopObservers()");
 
     if (this._state < PUSH_SERVICE_ACTIVATING) {
       return;
     }
 
     prefs.ignore("connection.enabled", this);
+    prefs.ignore("alwaysConnect", this);
 
     Services.obs.removeObserver(this, "network:offline-status-changed");
     Services.obs.removeObserver(this, "clear-origin-attributes-data");
     Services.obs.removeObserver(this, "idle-daily");
     Services.obs.removeObserver(this, "perm-changed");
   },
 
   _shutdownService() {