diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/test-bug-603750-websocket.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/test-bug-603750-websocket.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+window.addEventListener("load", function () {
+  var ws1 = new WebSocket("ws://0.0.0.0:81");
+  ws1.onopen = function() {
+    ws1.send("test 1");
+    ws1.close();
+  };
+
+  var ws2 = new window.frames[0].WebSocket("ws://0.0.0.0:82");
+  ws2.onopen = function() {
+    ws2.send("test 2");
+    ws2.close();
+  };
+}, false);