1 files changed, 10 insertions, 0 deletions
diff --git a/browser/base/content/test/tabPrompts/openPromptOffTimeout.html b/browser/base/content/test/tabPrompts/openPromptOffTimeout.html
new file mode 100644
index 0000000000..5dfd8cbeff
--- /dev/null
+++ b/browser/base/content/test/tabPrompts/openPromptOffTimeout.html
@@ -0,0 +1,10 @@
+<body>
+This page opens an alert box when the page is hidden.
+<script>
+document.addEventListener("visibilitychange", () => {
+  if (document.hidden) {
+    alert("You hid my page!");
+  }
+});
+</script>
+</body>