diff --git a/dom/apps/PermissionsTable.jsm b/dom/apps/PermissionsTable.jsm
index ed4abd20f82..ca7b4a2694f 100644
--- a/dom/apps/PermissionsTable.jsm
+++ b/dom/apps/PermissionsTable.jsm
@@ -579,12 +579,6 @@ this.PermissionsTable =  { geolocation: {
                              privileged: DENY_ACTION,
                              certified: ALLOW_ACTION
                            },
-                           "moz-extremely-unstable-and-will-change-webcomponents": {
-                              app: DENY_ACTION,
-                              trusted: DENY_ACTION,
-                              privileged: ALLOW_ACTION,
-                              certified: ALLOW_ACTION
-                           }
                          };
 
 /**
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index c85d9cc8d52..60c7ba424f9 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -92,7 +92,6 @@
 #include "nsIAuthPrompt2.h"
 
 #include "nsIScriptSecurityManager.h"
-#include "nsIPermissionManager.h"
 #include "nsIPrincipal.h"
 
 #include "nsIDOMWindow.h"
@@ -5832,31 +5831,9 @@ nsDocument::CustomElementConstructor(JSContext* aCx, unsigned aArgc, JS::Value*
 bool
 nsDocument::IsWebComponentsEnabled(JSContext* aCx, JSObject* aObject)
 {
-  if (Preferences::GetBool("dom.webcomponents.enabled")) {
-    return true;
-  }
-
-  // Check for the webcomponents permission. See Bug 1181555.
-  JSAutoCompartment ac(aCx, aObject);
-  JS::Rooted<JSObject*> global(aCx, JS_GetGlobalForObject(aCx, aObject));
-  nsCOMPtr<nsPIDOMWindow> window =
-    do_QueryInterface(nsJSUtils::GetStaticScriptGlobal(global));
-
-  if (window) {
-    nsresult rv;
-    nsCOMPtr<nsIPermissionManager> permMgr =
-      do_GetService(NS_PERMISSIONMANAGER_CONTRACTID, &rv);
-    NS_ENSURE_SUCCESS(rv, false);
-
-    uint32_t perm;
-    rv = permMgr->TestPermissionFromWindow(
-      window, "moz-extremely-unstable-and-will-change-webcomponents", &perm);
-    NS_ENSURE_SUCCESS(rv, false);
-
-    return perm == nsIPermissionManager::ALLOW_ACTION;
-  }
-
-  return false;
+  JS::Rooted<JSObject*> obj(aCx, aObject);
+  return Preferences::GetBool("dom.webcomponents.enabled") ||
+    IsInCertifiedApp(aCx, obj);
 }
 
 nsresult