diff --git a/static/client.html b/static/client.html
index 204b91292..9bc16cbce 100644
--- a/static/client.html
+++ b/static/client.html
@@ -101,7 +101,7 @@
 </head>
 <body>
   <div id="banner" class="offline">
-    <a href="debug.html%X_UA_COMPATIBLE_URL%" target="_blank" rel="noreferrer" class="btn-debug">DEBUG</a>
+    <a href="#" onclick="window.open('debug.html%X_UA_COMPATIBLE_URL%')" class="btn-debug">DEBUG</a>
     <h1 id="title">Karma - starting</h1>
   </div>
 
