1 files changed, 42 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_945739_showInPrivateBrowsing_customize_mode.js b/browser/components/customizableui/test/browser_945739_showInPrivateBrowsing_customize_mode.js
new file mode 100644
index 0000000000..bac97aed3b
--- /dev/null
+++ b/browser/components/customizableui/test/browser_945739_showInPrivateBrowsing_customize_mode.js
@@ -0,0 +1,42 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const kWidgetId = "test-private-browsing-customize-mode-widget";
+
+// Add a widget via the API with showInPrivateBrowsing set to false
+// and ensure it does not appear in the list of unused widgets in private
+// windows.
+add_task(async function testPrivateBrowsingCustomizeModeWidget() {
+  CustomizableUI.createWidget({
+    id: kWidgetId,
+    showInPrivateBrowsing: false,
+  });
+
+  let normalWidgetArray = CustomizableUI.getUnusedWidgets(gNavToolbox.palette);
+  normalWidgetArray = normalWidgetArray.map(w => w.id);
+  ok(
+    normalWidgetArray.indexOf(kWidgetId) > -1,
+    "Widget should appear as unused in non-private window"
+  );
+
+  let privateWindow = await openAndLoadWindow({ private: true });
+  let privateWidgetArray = CustomizableUI.getUnusedWidgets(
+    privateWindow.gNavToolbox.palette
+  );
+  privateWidgetArray = privateWidgetArray.map(w => w.id);
+  is(
+    privateWidgetArray.indexOf(kWidgetId),
+    -1,
+    "Widget should not appear as unused in private window"
+  );
+  await promiseWindowClosed(privateWindow);
+
+  CustomizableUI.destroyWidget(kWidgetId);
+});
+
+add_task(async function asyncCleanup() {
+  await resetCustomization();
+});