--- a/netwerk/socket/nsITransportSecurityInfo.idl
+++ b/netwerk/socket/nsITransportSecurityInfo.idl
@@ -3,20 +3,21 @@
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "nsISupports.idl"
 
 interface nsIX509CertList;
 
-[scriptable, uuid(c754ef58-853f-4870-abf7-98be325d2b97)]
+[scriptable, uuid(216112d3-28bc-4671-b057-f98cc09ba1ea)]
 interface nsITransportSecurityInfo : nsISupports {
     readonly attribute unsigned long    securityState;
     readonly attribute wstring          errorMessage;
+    readonly attribute long             errorCode; // PRErrorCode
 
     /**
      * If certificate verification failed, this will be the peer certificate
      * chain provided in the handshake, so it can be used for error reporting.
      * If verification succeeded, this will be null.
      */
     readonly attribute nsIX509CertList failedCertChain;
 };

--- a/security/manager/ssl/src/TransportSecurityInfo.cpp
+++ b/security/manager/ssl/src/TransportSecurityInfo.cpp
@@ -261,16 +261,23 @@ TransportSecurityInfo::formatErrorMessag
 
   if (NS_FAILED(rv)) {
     result.Truncate();
   }
 
   return rv;
 }
 
+NS_IMETHODIMP
+TransportSecurityInfo::GetErrorCode(int32_t* state)
+{
+  *state = GetErrorCode();
+  return NS_OK;
+}
+
 /* void getInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result); */
 NS_IMETHODIMP
 TransportSecurityInfo::GetInterface(const nsIID & uuid, void * *result)
 {
   if (!NS_IsMainThread()) {
     NS_ERROR("nsNSSSocketInfo::GetInterface called off the main thread");
     return NS_ERROR_NOT_SAME_THREAD;
   }