--- a/dom/webidl/Navigator.webidl
+++ b/dom/webidl/Navigator.webidl
@@ -89,20 +89,20 @@ interface NavigatorContentUtils {
 [NoInterfaceObject]
 interface NavigatorStorageUtils {
   // NOT IMPLEMENTED
   //void yieldForStorageUpdates();
 };
 
 [NoInterfaceObject]
 interface NavigatorFeatures {
-  [CheckAnyPermissions="feature-detection", Throws]
+  [ChromeOnly, Throws]
   Promise<any> getFeature(DOMString name);
 
-  [CheckAnyPermissions="feature-detection", Throws]
+  [ChromeOnly, Throws]
   Promise<any> hasFeature(DOMString name);
 };
 
 partial interface Navigator {
   [Throws]
   readonly attribute Permissions permissions;
 };