1 files changed, 48 insertions, 0 deletions
diff --git a/browser/components/customizableui/test/browser_963639_customizing_attribute_non_customizable_toolbar.js b/browser/components/customizableui/test/browser_963639_customizing_attribute_non_customizable_toolbar.js
new file mode 100644
index 0000000000..db829ab411
--- /dev/null
+++ b/browser/components/customizableui/test/browser_963639_customizing_attribute_non_customizable_toolbar.js
@@ -0,0 +1,48 @@
+/* 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 kToolbar = "test-toolbar-963639-non-customizable-customizing-attribute";
+
+add_task(async function () {
+  info(
+    "Test for Bug 963639 - CustomizeMode _onToolbarVisibilityChange sets @customizing on non-customizable toolbars"
+  );
+
+  let toolbar = document.createXULElement("toolbar");
+  toolbar.id = kToolbar;
+  gNavToolbox.appendChild(toolbar);
+
+  let testToolbar = document.getElementById(kToolbar);
+  ok(testToolbar, "Toolbar was created.");
+  is(
+    gNavToolbox.getElementsByAttribute("id", kToolbar).length,
+    1,
+    "Toolbar was added to the navigator toolbox"
+  );
+
+  toolbar.setAttribute(
+    "toolbarname",
+    "NonCustomizableToolbarCustomizingAttribute"
+  );
+  toolbar.setAttribute("collapsed", "true");
+
+  await startCustomizing();
+  window.setToolbarVisibility(toolbar, "true");
+  isnot(
+    toolbar.getAttribute("customizing"),
+    "true",
+    "Toolbar doesn't have the customizing attribute"
+  );
+
+  await endCustomizing();
+  gNavToolbox.removeChild(toolbar);
+
+  is(
+    gNavToolbox.getElementsByAttribute("id", kToolbar).length,
+    0,
+    "Toolbar was removed from the navigator toolbox"
+  );
+});