diff --git a/prod-refractr.yml b/prod-refractr.yml
index 8e9d9f7..3cf7c6d 100644
--- a/prod-refractr.yml
+++ b/prod-refractr.yml
@@ -1296,3 +1296,7 @@ refracts:
 
 - whattrainisitnow.com/:
     - www.whattrainisitnow.com
+
+# SE-4257
+- www.mozilla.org/advertising/:
+    - advertising.mozilla.org