1 files changed, 44 insertions, 0 deletions
diff --git a/browser/components/extensions/test/browser/browser_ext_tabs_cookieStoreId_private.js b/browser/components/extensions/test/browser/browser_ext_tabs_cookieStoreId_private.js
new file mode 100644
index 0000000000..556aa78288
--- /dev/null
+++ b/browser/components/extensions/test/browser/browser_ext_tabs_cookieStoreId_private.js
@@ -0,0 +1,44 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+add_task(async function perma_private_browsing_mode() {
+  // make sure userContext is enabled.
+  await SpecialPowers.pushPrefEnv({
+    set: [["privacy.userContext.enabled", true]],
+  });
+
+  Assert.equal(
+    Services.prefs.getBoolPref("browser.privatebrowsing.autostart"),
+    true,
+    "Permanent private browsing is enabled"
+  );
+
+  let extension = ExtensionTestUtils.loadExtension({
+    incognitoOverride: "spanning",
+    manifest: {
+      permissions: ["tabs", "cookies"],
+    },
+    async background() {
+      let win = await browser.windows.create({});
+      browser.test.assertTrue(
+        win.incognito,
+        "New window should be private when perma-PBM is enabled."
+      );
+      await browser.test.assertRejects(
+        browser.tabs.create({
+          cookieStoreId: "firefox-container-1",
+          windowId: win.id,
+        }),
+        /Illegal to set non-private cookieStoreId in a private window/,
+        "should refuse to open container tab in private browsing window"
+      );
+      await browser.windows.remove(win.id);
+
+      browser.test.sendMessage("done");
+    },
+  });
+  await extension.startup();
+  await extension.awaitMessage("done");
+  await extension.unload();
+});