--- a/dom/apps/AppsServiceChild.jsm
+++ b/dom/apps/AppsServiceChild.jsm
@@ -126,19 +126,16 @@ this.DOMApplicationRegistry = {
     // cpmm.addMessageListener causes the DOMApplicationRegistry object to
     // live forever if we don't clean up properly.
     this.webapps = null;
     this.DOMApps = null;
 
     APPS_IPC_MSG_NAMES.forEach((aMsgName) => {
       this.cpmm.removeMessageListener(aMsgName, this);
     });
-
-    this.cpmm.sendAsyncMessage("Webapps:UnregisterForMessages",
-                               APPS_IPC_MSG_NAMES)
   },
 
   receiveMessage: function receiveMessage(aMessage) {
     debug("Received " + aMessage.name + " message.");
     let msg = aMessage.data;
     switch (aMessage.name) {
       case "Webapps:AddApp":
         this.webapps[msg.id] = msg.app;