set referrer-policy to none

diff --git a/index.php b/index.php
index 10c75480359024d42fde0693de43219f7dc63f8c..203ecef662d888108f46c6d07976cd02202f366f 100644 (file)
--- a/index.php
+++ b/index.php
@@ -118,6 +118,7 @@
        </script>
 
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+       <meta name="referrer" content="none"/>
 
        <script type="text/javascript">
                Event.observe(window, 'load', function() {