--- a/toolkit/components/parentalcontrols/nsParentalControlsServiceCocoa.mm
+++ b/toolkit/components/parentalcontrols/nsParentalControlsServiceCocoa.mm
@@ -27,32 +27,35 @@ nsParentalControlsService::GetParentalCo
 {
   *aResult = mEnabled;
   return NS_OK;
 }
 
 NS_IMETHODIMP
 nsParentalControlsService::GetBlockFileDownloadsEnabled(bool *aResult)
 {
-  return NS_ERROR_NOT_AVAILABLE;
+  *aResult = false;
+  return NS_OK;
 }
 
 NS_IMETHODIMP
 nsParentalControlsService::GetLoggingEnabled(bool *aResult)
 {
-  return NS_ERROR_NOT_AVAILABLE;
+  *aResult = false;
+  return NS_OK;
 }
 
 NS_IMETHODIMP
 nsParentalControlsService::Log(int16_t aEntryType,
                                bool blocked,
                                nsIURI *aSource,
                                nsIFile *aTarget)
 {
-  return NS_ERROR_NOT_AVAILABLE;
+  // silently drop on the floor
+  return NS_OK;
 }
 
 NS_IMETHODIMP
 nsParentalControlsService::RequestURIOverride(nsIURI *aTarget,
                                               nsIInterfaceRequestor *aWindowContext,
                                               bool *_retval)
 {
   return NS_ERROR_NOT_AVAILABLE;