--- a/dom/base/domerr.msg
+++ b/dom/base/domerr.msg
@@ -88,17 +88,16 @@ DOM4_MSG_DEF(UnknownError, "The operatio
 DOM_MSG_DEF(NS_ERROR_DOM_SECMAN_ERR, "Unable to obtain security manager")
 DOM_MSG_DEF(NS_ERROR_DOM_WRONG_TYPE_ERR, "Object is of wrong type")
 DOM_MSG_DEF(NS_ERROR_DOM_NOT_OBJECT_ERR, "Parameter is not an object")
 DOM_MSG_DEF(NS_ERROR_DOM_NOT_XPC_OBJECT_ERR, "Parameter is not a XPConnect object")
 DOM_MSG_DEF(NS_ERROR_DOM_NOT_NUMBER_ERR, "Parameter is not a number")
 DOM_MSG_DEF(NS_ERROR_DOM_NOT_BOOLEAN_ERR, "Parameter is not a boolean")
 DOM_MSG_DEF(NS_ERROR_DOM_NOT_FUNCTION_ERR, "Parameter is not a Function")
 DOM_MSG_DEF(NS_ERROR_DOM_TOO_FEW_PARAMETERS_ERR, "Too few parameters to method")
-DOM_MSG_DEF(NS_ERROR_DOM_BAD_DOCUMENT_DOMAIN, "Illegal document.domain value")
 DOM_MSG_DEF(NS_ERROR_DOM_PROP_ACCESS_DENIED, "Access to property denied")
 DOM_MSG_DEF(NS_ERROR_DOM_XPCONNECT_ACCESS_DENIED, "Access to XPConnect service denied")
 DOM_MSG_DEF(NS_ERROR_DOM_BAD_URI, "Access to restricted URI denied")
 DOM_MSG_DEF(NS_ERROR_DOM_RETVAL_UNDEFINED, "Return value is undefined")
 DOM_MSG_DEF(NS_ERROR_DOM_QUOTA_REACHED, "Persistent storage maximum size reached")
 
 DOM4_MSG_DEF(NotFoundError, "File was not found", NS_ERROR_DOM_FILE_NOT_FOUND_ERR)
 DOM4_MSG_DEF(NotReadableError, "File could not be read", NS_ERROR_DOM_FILE_NOT_READABLE_ERR)

--- a/xpcom/base/ErrorList.py
+++ b/xpcom/base/ErrorList.py
@@ -630,17 +630,16 @@ with modules["DOM"]:
     errors["NS_ERROR_DOM_SECMAN_ERR"] = FAILURE(1001)
     errors["NS_ERROR_DOM_WRONG_TYPE_ERR"] = FAILURE(1002)
     errors["NS_ERROR_DOM_NOT_OBJECT_ERR"] = FAILURE(1003)
     errors["NS_ERROR_DOM_NOT_XPC_OBJECT_ERR"] = FAILURE(1004)
     errors["NS_ERROR_DOM_NOT_NUMBER_ERR"] = FAILURE(1005)
     errors["NS_ERROR_DOM_NOT_BOOLEAN_ERR"] = FAILURE(1006)
     errors["NS_ERROR_DOM_NOT_FUNCTION_ERR"] = FAILURE(1007)
     errors["NS_ERROR_DOM_TOO_FEW_PARAMETERS_ERR"] = FAILURE(1008)
-    errors["NS_ERROR_DOM_BAD_DOCUMENT_DOMAIN"] = FAILURE(1009)
     errors["NS_ERROR_DOM_PROP_ACCESS_DENIED"] = FAILURE(1010)
     errors["NS_ERROR_DOM_XPCONNECT_ACCESS_DENIED"] = FAILURE(1011)
     errors["NS_ERROR_DOM_BAD_URI"] = FAILURE(1012)
     errors["NS_ERROR_DOM_RETVAL_UNDEFINED"] = FAILURE(1013)
     errors["NS_ERROR_DOM_QUOTA_REACHED"] = FAILURE(1014)
 
     # A way to represent uncatchable exceptions
     errors["NS_ERROR_UNCATCHABLE_EXCEPTION"] = FAILURE(1015)