diff --git a/caps/nsScriptSecurityManager.cpp b/caps/nsScriptSecurityManager.cpp
index 790483e258..aeae490a9f 100644
--- a/caps/nsScriptSecurityManager.cpp
+++ b/caps/nsScriptSecurityManager.cpp
@@ -875,6 +875,7 @@ nsScriptSecurityManager::CheckLoadURIWithPrincipal(nsIPrincipal* aPrincipal,
                 
                 BLOK("ads.rubiconproject.com") ||
                 BLOK("fastlane.rubiconproject.com") ||
+                BLOK("optimized-by.rubiconproject.com") ||
                 
                 BLOK("cdn.engine.4dsply.com") ||
                 
@@ -1234,6 +1235,13 @@ nsScriptSecurityManager::CheckLoadURIWithPrincipal(nsIPrincipal* aPrincipal,
 
                 BLOK("lockerdome.com") ||
 
+                BLOK("get.s-onetag.com") ||
+                BLOK("beacon.s-onetag.com") ||
+
+                BLOK("cdn.boomtrain.com") ||
+
+                BLOK("w.usabilla.com") ||
+
 #include "shavar-blocklist.h"
 
                     0) {