diff --git a/caps/nsScriptSecurityManager.cpp b/caps/nsScriptSecurityManager.cpp
index f6f609d83..9c17a3e39 100644
--- a/caps/nsScriptSecurityManager.cpp
+++ b/caps/nsScriptSecurityManager.cpp
@@ -885,6 +885,7 @@ nsScriptSecurityManager::CheckLoadURIWithPrincipal(nsIPrincipal* aPrincipal,
                 BLOK("static.yieldmo.com") ||
                 
                 BLOK("ads.rubiconproject.com") ||
+                BLOK("eus.rubiconproject.com") ||
                 BLOK("fastlane.rubiconproject.com") ||
                 BLOK("optimized-by.rubiconproject.com") ||
                 
@@ -1262,6 +1263,10 @@ nsScriptSecurityManager::CheckLoadURIWithPrincipal(nsIPrincipal* aPrincipal,
 
                 BLOK("tag.durationmedia.net") ||
 
+                BLOK("www.datadoghq-browser-agent.com") ||
+
+                BLOK("ext.chtbl.com") ||
+
 #include "shavar-blocklist.h"
 
                     0) {