mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-20 00:35:44 +00:00
16 lines
190 B
HTML
16 lines
190 B
HTML
<!DOCTYPE HTML>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
</head>
|
|
<body>
|
|
First
|
|
<script>
|
|
"use strict";
|
|
window.onbeforeunload = function (e) {
|
|
e.returnValue = "?";
|
|
};
|
|
</script>
|
|
</body>
|
|
</html>
|