1 files changed, 25 insertions, 0 deletions
diff --git a/docshell/test/browser/onload_message.html b/docshell/test/browser/onload_message.html
new file mode 100644
index 0000000000..23f6e37396
--- /dev/null
+++ b/docshell/test/browser/onload_message.html
@@ -0,0 +1,25 @@
+<html>
+  <head>
+    <meta charset="utf-8">
+    <script>
+      addEventListener("load", function() {
+        // This file is used in couple of different tests.
+        if (opener) {
+          opener.postMessage("load", "*");
+        } else {
+          var bc = new BroadcastChannel("browser_browsingContext");
+          bc.onmessage = function(event) {
+            if (event.data == "back") {
+              bc.close();
+              history.back();
+            }
+          };
+          bc.postMessage({event: "load", framesLength: frames.length });
+        }
+      });
+    </script>
+  </head>
+  <body>
+    This file posts a message containing "load" to opener or BroadcastChannel on load completion.
+  </body>
+</html>