<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=612267 --> <head> <title>Test for Bug 393974</title> <script src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=612267">Mozilla Bug 612267</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script class="testbody" type="text/javascript"> Window.prototype.test = 'PASS'; is(window.test, 'PASS', "setting Window.prototype affects window.__proto__"); is(test, 'PASS', "setting Window.prototype affects the inner window lookup for sure"); </script> </pre> </body> </html>