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-rw-r--r--js/xpconnect/tests/browser/browser_realm_key_object_prototype_frame.html11
1 files changed, 11 insertions, 0 deletions
diff --git a/js/xpconnect/tests/browser/browser_realm_key_object_prototype_frame.html b/js/xpconnect/tests/browser/browser_realm_key_object_prototype_frame.html
new file mode 100644
index 0000000000..5f3c0b5c2c
--- /dev/null
+++ b/js/xpconnect/tests/browser/browser_realm_key_object_prototype_frame.html
@@ -0,0 +1,11 @@
+<script type="text/javascript">
+// Access to the top-level window property before getting access.
+// This will create an entry in cross-origin realm map.
+try {
+ window.top.Object;
+} catch (e) {}
+
+document.domain = "mochi.test";
+
+window.top.check();
+</script>