diff --git a/content/xml/document/src/nsXMLDocument.cpp b/content/xml/document/src/nsXMLDocument.cpp
index bb67975a04f3..41e3e174feaf 100644
--- a/content/xml/document/src/nsXMLDocument.cpp
+++ b/content/xml/document/src/nsXMLDocument.cpp
@@ -296,13 +296,6 @@ nsXMLDocument::OnChannelRedirect(nsIChannel *aOldChannel,
     return rv;
   }
 
-  // XXXbz Shouldn't we look at the owner on the new channel at some point?
-  // It's not gonna be right here, but eventually it will....
-  nsCOMPtr<nsIPrincipal> principal;
-  rv = secMan->GetCodebasePrincipal(newLocation, getter_AddRefs(principal));
-  NS_ENSURE_SUCCESS(rv, rv);
-
-  SetPrincipal(principal);
   return NS_OK;
 }
 
@@ -368,8 +361,9 @@ nsXMLDocument::Load(const nsAString& aUrl, PRBool *aReturn)
     return rv;
   }
 
+  nsCOMPtr<nsIPrincipal> principal = NodePrincipal();
   nsCOMPtr<nsIURI> codebase;
-  NodePrincipal()->GetURI(getter_AddRefs(codebase));
+  principal->GetURI(getter_AddRefs(codebase));
 
   // Get security manager, check to see whether the current document
   // is allowed to load this URI. It's important to use the current
@@ -413,7 +407,6 @@ nsXMLDocument::Load(const nsAString& aUrl, PRBool *aReturn)
   // be loaded.  Note that we need to hold a strong ref to |principal|
   // here, because ResetToURI will null out our node principal before
   // setting the new one.
-  nsCOMPtr<nsIPrincipal> principal = NodePrincipal();
   nsCOMPtr<nsIEventListenerManager> elm(mListenerManager);
   mListenerManager = nsnull;
 
@@ -441,23 +434,6 @@ nsXMLDocument::Load(const nsAString& aUrl, PRBool *aReturn)
     return rv;
   }
 
-  // Set a principal for this document
-  // XXXbz StartDocumentLoad should handle that.... And we shouldn't be calling
-  // StartDocumentLoad until we get an OnStartRequest from this channel!
-  nsCOMPtr<nsISupports> channelOwner;
-  rv = channel->GetOwner(getter_AddRefs(channelOwner));
-
-  // We don't care if GetOwner() succeeded here, if it failed,
-  // channelOwner will be null, which is what we want in that case.
-  principal = do_QueryInterface(channelOwner);
-
-  if (NS_FAILED(rv) || !principal) {
-    rv = secMan->GetCodebasePrincipal(uri, getter_AddRefs(principal));
-    NS_ENSURE_TRUE(principal, rv);
-  }
-
-  SetPrincipal(principal);
-
   // Prepare for loading the XML document "into oneself"
   nsCOMPtr<nsIStreamListener> listener;
   if (NS_FAILED(rv = StartDocumentLoad(kLoadAsData, channel,