1 files changed, 16 insertions, 0 deletions
diff --git a/layout/style/test/browser_bug453896.js b/layout/style/test/browser_bug453896.js
new file mode 100644
index 0000000000..6b8e180c38
--- /dev/null
+++ b/layout/style/test/browser_bug453896.js
@@ -0,0 +1,16 @@
+add_task(async function () {
+  let uri = getRootDirectory(gTestPath) + "bug453896_iframe.html";
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: uri,
+    },
+    function (browser) {
+      return SpecialPowers.spawn(browser, [], async function () {
+        var fake_window = { ok: ok };
+        content.wrappedJSObject.run(fake_window);
+      });
+    }
+  );
+});