1 files changed, 39 insertions, 0 deletions
diff --git a/dom/security/test/mixedcontentblocker/file_bug1550792.html b/dom/security/test/mixedcontentblocker/file_bug1550792.html
new file mode 100644
index 0000000000..30bdc5d5c5
--- /dev/null
+++ b/dom/security/test/mixedcontentblocker/file_bug1550792.html
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+</head>
+<body>
+  <iframe id="nestframe"></iframe>
+<script>
+  let nestframe = document.getElementById("nestframe");
+
+  window.addEventListener("message", (event) => {
+    parent.postMessage(event.data, "*");
+
+    // Only create second iframe once
+    if(event.data.type === "https") {
+      return;
+    }
+
+    nestframe.contentDocument.body.innerHTML = `
+        <iframe id="frametwo"
+          src=\"https://example.com\"
+          onload=\"parent.postMessage({status:'loaded', type: 'https'}, '*')\"
+          onerror=\"parent.postMessage({status:'blocked', type: 'https'}, '*')\"
+        ></iframe>`;
+  });
+
+  nestframe.onload = (event) => {
+    nestframe.contentDocument.body.innerHTML = `
+      <iframe id="frameone"
+        src=\"http://example.com\"
+        onload=\"parent.postMessage({status:'loaded', type: 'http'}, '*')\"
+        onerror=\"parent.postMessage({status:'blocked', type: 'http'}, '*')\"
+      ></iframe>`;
+  }
+
+  nestframe.src = "about:blank";
+</script>
+</body>
+</html>