diff --git a/js/xpconnect/idl/nsIScriptError.idl b/js/xpconnect/idl/nsIScriptError.idl
index 74388de4a49..b4ffd8b55be 100644
--- a/js/xpconnect/idl/nsIScriptError.idl
+++ b/js/xpconnect/idl/nsIScriptError.idl
@@ -11,7 +11,7 @@
 #include "nsISupports.idl"
 #include "nsIConsoleMessage.idl"
 
-[scriptable, uuid(ec640482-be5f-49a0-a9cb-c87eacce9291)]
+[scriptable, uuid(cac9d8e8-0d53-4fa8-9903-bb367e4fa1fe)]
 interface nsIScriptError : nsIConsoleMessage
 {
     /** pseudo-flag for default case */
@@ -49,15 +49,6 @@ interface nsIScriptError : nsIConsoleMessage
      */
     readonly attribute string category;
 
-    /*
-       The time (in milliseconds from the Epoch) that the script error instance
-       was initialised, and thus the time when the error occurred.
-       Currently used to display date and time of the message in Error console.
-       The timestamp is initialized as JS_now/1000 so that it can be
-       compared to Date.now in Javascript.
-     */
-    readonly attribute long long timeStamp;
-
     /* Get the window id this was initialized with.  Zero will be
        returned if init() was used instead of initWithWindowID(). */
     readonly attribute unsigned long long outerWindowID;
@@ -87,13 +78,11 @@ interface nsIScriptError : nsIConsoleMessage
                           in uint32_t flags,
                           in string category,
                           in unsigned long long innerWindowID);
-
-    AUTF8String toString();
 };
 
 %{ C++
 #define NS_SCRIPTERROR_CID \
-{ 0xe38e53b9, 0x5bb0, 0x456a, { 0xb5, 0x53, 0x57, 0x93, 0x70, 0xcb, 0x15, 0x67 }}
+{ 0x1950539a, 0x90f0, 0x4d22, { 0xb5, 0xaf, 0x71, 0x32, 0x9c, 0x68, 0xfa, 0x35 }}
 
 #define NS_SCRIPTERROR_CONTRACTID "@mozilla.org/scripterror;1"
 %}
diff --git a/xpcom/base/nsConsoleMessage.cpp b/xpcom/base/nsConsoleMessage.cpp
index 119e1b1d942..6c5c005c8db 100644
--- a/xpcom/base/nsConsoleMessage.cpp
+++ b/xpcom/base/nsConsoleMessage.cpp
@@ -9,29 +9,41 @@
 
 #include "nsConsoleMessage.h"
 #include "nsReadableUtils.h"
+#include "jsapi.h"
 
 NS_IMPL_THREADSAFE_ISUPPORTS1(nsConsoleMessage, nsIConsoleMessage)
 
-nsConsoleMessage::nsConsoleMessage() 
+nsConsoleMessage::nsConsoleMessage()
+    :  mMessage(),
+       mTimeStamp(0)
 {
 }
 
-nsConsoleMessage::nsConsoleMessage(const PRUnichar *message) 
+nsConsoleMessage::nsConsoleMessage(const PRUnichar *message)
 {
-	mMessage.Assign(message);
+  mTimeStamp = JS_Now() / 1000;
+  mMessage.Assign(message);
 }
 
 NS_IMETHODIMP
-nsConsoleMessage::GetMessageMoz(PRUnichar **result) {
-    *result = ToNewUnicode(mMessage);
+nsConsoleMessage::GetMessageMoz(PRUnichar **result)
+{
+  *result = ToNewUnicode(mMessage);
 
-    return NS_OK;
+  return NS_OK;
 }
 
-//  NS_IMETHODIMP
-//  nsConsoleMessage::Init(const PRUnichar *message) {
-//      nsAutoString newMessage(message);
-//      mMessage = ToNewUnicode(newMessage);
-//      return NS_OK;
-//  }
+NS_IMETHODIMP
+nsConsoleMessage::GetTimeStamp(int64_t *aTimeStamp)
+{
+  *aTimeStamp = mTimeStamp;
+  return NS_OK;
+}
 
+NS_IMETHODIMP
+nsConsoleMessage::ToString(nsACString& /*UTF8*/ aResult)
+{
+  CopyUTF16toUTF8(mMessage, aResult);
+
+  return NS_OK;
+}
diff --git a/xpcom/base/nsConsoleMessage.h b/xpcom/base/nsConsoleMessage.h
index 6fae2655b0e..95fbd3864de 100644
--- a/xpcom/base/nsConsoleMessage.h
+++ b/xpcom/base/nsConsoleMessage.h
@@ -22,6 +22,7 @@ public:
 private:
     ~nsConsoleMessage() {}
 
+    int64_t mTimeStamp;
     nsString mMessage;
 };
 
diff --git a/xpcom/base/nsIConsoleMessage.idl b/xpcom/base/nsIConsoleMessage.idl
index 360e5360ac0..ba6a80f8d93 100644
--- a/xpcom/base/nsIConsoleMessage.idl
+++ b/xpcom/base/nsIConsoleMessage.idl
@@ -10,13 +10,23 @@
  * provide an object that can be qi'ed to provide more specific
  * message information.
  */
-[scriptable, uuid(41bd8784-1dd2-11b2-9553-8606958fffe1)]
+[scriptable, uuid(c14c151b-5ea4-47ed-8e85-d392cdd3e154)]
 interface nsIConsoleMessage : nsISupports
 {
+    /**
+     * The time (in milliseconds from the Epoch) that the message instance
+     * was initialised.
+     * The timestamp is initialized as JS_now/1000 so that it can be
+     * compared to Date.now in Javascript.
+     */
+    readonly attribute long long timeStamp;
+
     [binaryname(MessageMoz)] readonly attribute wstring message;
+
+    AUTF8String toString();
 };
 
 %{ C++
 #define NS_CONSOLEMESSAGE_CID \
-{ 0x56c9d666, 0x1dd2, 0x11b2, { 0xb4, 0x3c, 0xa8, 0x4b, 0xf3, 0xb3, 0xec, 0xbb }}
+{ 0x024efc9e, 0x54dc, 0x4844, { 0x80, 0x4b, 0x41, 0xd3, 0xf3, 0x69, 0x90, 0x73 }}
 %}