diff --git a/dom/json/nsJSON.cpp b/dom/json/nsJSON.cpp
index b5481468842..ae399933307 100644
--- a/dom/json/nsJSON.cpp
+++ b/dom/json/nsJSON.cpp
@@ -22,6 +22,7 @@
 #include "nsCRTGlue.h"
 #include "nsAutoPtr.h"
 #include "nsIScriptSecurityManager.h"
+#include "nsNullPrincipal.h"
 #include "mozilla/Maybe.h"
 #include <algorithm>
 
@@ -409,9 +410,19 @@ nsJSON::DecodeInternal(JSContext* cx,
       return NS_ERROR_OUT_OF_MEMORY;
   }
 
-  nsresult rv =
-    NS_NewInputStreamChannel(getter_AddRefs(jsonChannel), mURI, aStream,
-                             NS_LITERAL_CSTRING("application/json"));
+  nsresult rv;
+  nsCOMPtr<nsIPrincipal> nullPrincipal =
+    do_CreateInstance("@mozilla.org/nullprincipal;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = NS_NewInputStreamChannel(getter_AddRefs(jsonChannel),
+                                mURI,
+                                aStream,
+                                nullPrincipal,
+                                nsILoadInfo::SEC_NORMAL,
+                                nsIContentPolicy::TYPE_OTHER,
+                                NS_LITERAL_CSTRING("application/json"));
+
   if (!jsonChannel || NS_FAILED(rv))
     return NS_ERROR_FAILURE;
 
diff --git a/dom/jsurl/nsJSProtocolHandler.cpp b/dom/jsurl/nsJSProtocolHandler.cpp
index 06ad830f7a6..2d3b56c6568 100644
--- a/dom/jsurl/nsJSProtocolHandler.cpp
+++ b/dom/jsurl/nsJSProtocolHandler.cpp
@@ -36,6 +36,7 @@
 #include "nsIContentViewer.h"
 #include "nsIXPConnect.h"
 #include "nsContentUtils.h"
+#include "nsNullPrincipal.h"
 #include "nsJSUtils.h"
 #include "nsThreadUtils.h"
 #include "nsIScriptChannel.h"
@@ -427,9 +428,18 @@ nsresult nsJSChannel::Init(nsIURI *aURI)
     // and the underlying Input Stream will not be created...
     nsCOMPtr<nsIChannel> channel;
 
+    nsCOMPtr<nsIPrincipal> nullPrincipal =
+      do_CreateInstance("@mozilla.org/nullprincipal;1", &rv);
+    NS_ENSURE_SUCCESS(rv, rv);
+
     // If the resultant script evaluation actually does return a value, we
     // treat it as html.
-    rv = NS_NewInputStreamChannel(getter_AddRefs(channel), aURI, mIOThunk,
+    rv = NS_NewInputStreamChannel(getter_AddRefs(channel),
+                                  aURI,
+                                  mIOThunk,
+                                  nullPrincipal,
+                                  nsILoadInfo::SEC_NORMAL,
+                                  nsIContentPolicy::TYPE_OTHER,
                                   NS_LITERAL_CSTRING("text/html"));
     if (NS_FAILED(rv)) return rv;