1 files changed, 18 insertions, 0 deletions
diff --git a/testing/specialpowers/content/AppTestDelegateChild.sys.mjs b/testing/specialpowers/content/AppTestDelegateChild.sys.mjs
new file mode 100644
index 0000000000..1d78d41f5d
--- /dev/null
+++ b/testing/specialpowers/content/AppTestDelegateChild.sys.mjs
@@ -0,0 +1,18 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+export class AppTestDelegateChild extends JSWindowActorChild {
+  handleEvent(event) {
+    switch (event.type) {
+      case "DOMContentLoaded":
+      case "load": {
+        this.sendAsyncMessage(event.type, {
+          internalURL: event.target.documentURI,
+          visibleURL: event.target.location?.href,
+        });
+        break;
+      }
+    }
+  }
+}