1 files changed, 24 insertions, 0 deletions
diff --git a/dom/browser-element/mochitest/file_focus.html b/dom/browser-element/mochitest/file_focus.html
new file mode 100644
index 000000000..0bd3f7aa4
--- /dev/null
+++ b/dom/browser-element/mochitest/file_focus.html
@@ -0,0 +1,24 @@
+<html>
+<body>
+
+Aloha!  My URL is <span id='url'></span>.
+<script>
+document.getElementById('url').innerHTML = window.location;
+</script>
+
+<script>
+  // The input element is getting synthesized key events and will prevent
+  // default on the first ESC keydown event.
+
+  var alreadyBlocked = false;
+
+  addEventListener('keydown', function(e) {
+    if (e.keyCode == SpecialPowers.Ci.nsIDOMKeyEvent.DOM_VK_ESCAPE &&
+        alreadyBlocked == false) {
+      alreadyBlocked = true;
+      e.preventDefault();
+    }
+  });
+</script>
+</body>
+</html>