--- npapi/npapi.h	2009-01-02 09:22:28.000000000 -0500
+++ npapi/npapi.h	2010-08-18 19:07:09.000000000 -0400
@@ -439,7 +439,9 @@ typedef enum {
   /* Get the NPObject wrapper for the plugins DOM element. */
   NPNVPluginElementNPObject = 16,
 
-  NPNVSupportsWindowless = 17
+  NPNVSupportsWindowless = 17,
+
+  NPNVprivateModeBool = 18
 
 } NPNVariable;
 
--- src/npw-rpc.c	2010-08-18 19:10:19.000000000 -0400
+++ src/npw-rpc.c	2010-08-18 19:08:24.000000000 -0400
@@ -41,6 +41,7 @@ int rpc_type_of_NPNVariable(int variable
   case NPNVisOfflineBool:
   case NPNVSupportsXEmbedBool:
   case NPNVSupportsWindowless:
+  case NPNVprivateModeBool:
 	type = RPC_TYPE_BOOLEAN;
 	break;
   case NPNVToolkit:
--- src/npw-viewer.c	2010-08-18 19:10:19.000000000 -0400
+++ src/npw-viewer.c	2010-08-18 19:05:46.000000000 -0400
@@ -1266,6 +1266,7 @@ g_NPN_GetValue(NPP instance, NPNVariable
   case NPNVSupportsXEmbedBool:
   case NPNVWindowNPObject:
   case NPNVPluginElementNPObject:
+  case NPNVprivateModeBool:
 	return g_NPN_GetValue_real(instance, variable, value);
   default:
 	switch (variable & 0xff) {
--- src/utils.c	2009-01-02 09:22:29.000000000 -0500
+++ src/utils.c	2010-08-18 19:09:31.000000000 -0400
@@ -283,6 +283,7 @@ const char *string_of_NPNVariable(int va
 	_(NPNVWindowNPObject);
 	_(NPNVPluginElementNPObject);
 	_(NPNVSupportsWindowless);
+	_(NPNVprivateModeBool);
 #undef _
   default:
 	switch (variable & 0xff) {