1 files changed, 13 insertions, 0 deletions
diff --git a/layout/style/test/browser_bug453896.js b/layout/style/test/browser_bug453896.js
new file mode 100644
index 000000000..0084ae33d
--- /dev/null
+++ b/layout/style/test/browser_bug453896.js
@@ -0,0 +1,13 @@
+add_task(function* () {
+  let uri = getRootDirectory(gTestPath) + "bug453896_iframe.html";
+
+  yield BrowserTestUtils.withNewTab({
+    gBrowser,
+    url: uri
+  }, function*(browser) {
+    return ContentTask.spawn(browser, null, function* () {
+      var fake_window = { ok: ok };
+      content.wrappedJSObject.run(fake_window);
+    });
+  });
+});