1 files changed, 42 insertions, 0 deletions
diff --git a/browser/components/extensions/test/browser/browser_ext_contentscript_incognito.js b/browser/components/extensions/test/browser/browser_ext_contentscript_incognito.js
new file mode 100644
index 0000000000..fc365a2a4a
--- /dev/null
+++ b/browser/components/extensions/test/browser/browser_ext_contentscript_incognito.js
@@ -0,0 +1,42 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+// Test that calling window.open from a content script running in a private
+// window does not trigger a crash (regression test introduced in Bug 1653530
+// to cover the issue introduced in Bug 1616353 and fixed by Bug 1638793).
+add_task(async function test_contentscript_window_open_doesnot_crash() {
+  const extension = ExtensionTestUtils.loadExtension({
+    incognitoOverride: "spanning",
+    manifest: {
+      content_scripts: [
+        {
+          matches: ["https://example.com/*"],
+          js: ["test_window_open.js"],
+        },
+      ],
+    },
+    files: {
+      "test_window_open.js": function () {
+        const newWin = window.open();
+        browser.test.log("calling window.open did not triggered a crash");
+        browser.test.sendMessage("window-open-called", !!newWin);
+      },
+    },
+  });
+  await extension.startup();
+
+  const winPrivate = await BrowserTestUtils.openNewBrowserWindow({
+    private: true,
+  });
+
+  await BrowserTestUtils.openNewForegroundTab(
+    winPrivate.gBrowser,
+    "https://example.com"
+  );
+  const newWinOpened = await extension.awaitMessage("window-open-called");
+  ok(newWinOpened, "Content script successfully open a new window");
+
+  await extension.unload();
+  await BrowserTestUtils.closeWindow(winPrivate);
+});