diff --git a/emrun.py b/emrun.py
index fd036b3bbf464..35d5ee67e62ee 100755
--- a/emrun.py
+++ b/emrun.py
@@ -596,6 +596,9 @@ def pid_existed(pid):
     self.send_header('Connection', 'close')
     self.send_header('Expires', '-1')
     self.send_header('Access-Control-Allow-Origin', '*')
+    self.send_header('Cross-Origin-Opener-Policy', 'same-origin')
+    self.send_header('Cross-Origin-Embedder-Policy', 'require-corp')
+    self.send_header('Cross-Origin-Resource-Policy', 'cross-origin')
     self.end_headers()
     page_last_served_time = tick()
     return f