diff --git a/fetch.bs b/fetch.bs
index e3bef0878..f1963a17b 100644
--- a/fetch.bs
+++ b/fetch.bs
@@ -2230,6 +2230,8 @@ or "object
".
return true:
client
".
+
Let lastURL be null.
client
".
+
If request has a redirect-tainted origin, then return
"null
".
@@ -2350,6 +2354,8 @@ source of security bugs. Please seek security review for features that deal with
request request, run these steps:
client
".
+
If request's mode is not "no-cors
", then return
true.
client
".
+
Let serializedOrigin be the result of byte-serializing a request origin with request. @@ -6632,6 +6640,8 @@ agent's CORS-preflight cache for which there is a cache entry matchresponse, run these steps:
client
".
+
If request's timing allow failed flag is set, then return failure.