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+++ b/docshell/test/chrome/test_open_and_immediately_close_opener.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Test for Bug 1702678</title>
+  <meta charset="utf-8">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1702678">Mozilla Bug 1702678</a>
+
+<script type="application/javascript">
+"use strict";
+
+const HTML = `
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <script>
+    // We need to queue a promise reaction job whilch will close the window
+    // during the nested event loop spun up by the window opening code.
+    Promise.resolve().then(() => {
+      window.close();
+    });
+    window.open("data:text/html,Hello");
+  <\/script>
+</head>
+</html>
+`;
+
+add_task(async function() {
+  // This bug only manifests when opening tabs in new windows.
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.link.open_newwindow", 2]],
+  });
+
+  // Create a window in a new BrowsingContextGroup so that it will be the last
+  // window in the group when it closes, and the group will be destroyed.
+  window.open(`data:text/html,${encodeURIComponent(HTML)}`, "", "noopener");
+
+  // Make a few trips through the event loop to ensure we've had a chance to
+  // open and close the relevant windows.
+  for (let i = 0; i < 10; i++) {
+    await new Promise(resolve => setTimeout(resolve, 0));
+  }
+
+  ok(true, "We didn't crash");
+});
+</script>
+
+</body>
+</html>
+