--- a/browser/components/extensions/test/browser/browser.ini
+++ b/browser/components/extensions/test/browser/browser.ini
@@ -25,16 +25,17 @@ support-files =
 [browser_ext_browserAction_simple.js]
 [browser_ext_commands_execute_page_action.js]
 [browser_ext_commands_getAll.js]
 [browser_ext_commands_onCommand.js]
 [browser_ext_contentscript_connect.js]
 [browser_ext_contextMenus.js]
 [browser_ext_contextMenus_checkboxes.js]
 [browser_ext_contextMenus_radioGroups.js]
+[browser_ext_contextMenus_uninstall.js]
 [browser_ext_currentWindow.js]
 [browser_ext_getViews.js]
 [browser_ext_history.js]
 [browser_ext_incognito_popup.js]
 [browser_ext_lastError.js]
 [browser_ext_optionsPage_privileges.js]
 [browser_ext_pageAction_context.js]
 [browser_ext_pageAction_popup.js]

new file mode 100644
--- /dev/null
+++ b/browser/components/extensions/test/browser/browser_ext_contextMenus_uninstall.js
@@ -0,0 +1,84 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+add_task(function* () {
+  let tab1 = yield BrowserTestUtils.openNewForegroundTab(gBrowser,
+    "http://mochi.test:8888/browser/browser/components/extensions/test/browser/context.html");
+
+  // Install an extension.
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      "permissions": ["contextMenus"],
+    },
+
+    background: function() {
+      browser.contextMenus.create({title: "a"});
+      browser.contextMenus.create({title: "b"});
+      browser.test.notifyPass("contextmenus-icons");
+    },
+  });
+
+  yield extension.startup();
+  yield extension.awaitFinish("contextmenus-icons");
+
+  // Open the context menu.
+  let contextMenu = yield openContextMenu("#img1");
+
+  // Confirm that the extension menu item exists.
+  let topLevelExtensionMenuItems = contextMenu.getElementsByAttribute("ext-type", "top-level-menu");
+  is(topLevelExtensionMenuItems.length, 1, "the top level extension menu item exists");
+
+  yield closeContextMenu();
+
+  // Uninstall the extension.
+  yield extension.unload();
+
+  // Open the context menu.
+  contextMenu = yield openContextMenu("#img1");
+
+  // Confirm that the extension menu item has been removed.
+  topLevelExtensionMenuItems = contextMenu.getElementsByAttribute("ext-type", "top-level-menu");
+  is(topLevelExtensionMenuItems.length, 0, "no top level extension menu items should exist");
+
+  yield closeContextMenu();
+
+  // Install a new extension.
+  extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      "permissions": ["contextMenus"],
+    },
+    background: function() {
+      browser.contextMenus.create({title: "c"});
+      browser.contextMenus.create({title: "d"});
+      browser.test.notifyPass("contextmenus-uninstall-second-extension");
+    },
+  });
+
+  yield extension.startup();
+  yield extension.awaitFinish("contextmenus-uninstall-second-extension");
+
+  // Open the context menu.
+  contextMenu = yield openContextMenu("#img1");
+
+  // Confirm that only the new extension menu item is in the context menu.
+  topLevelExtensionMenuItems = contextMenu.getElementsByAttribute("ext-type", "top-level-menu");
+  is(topLevelExtensionMenuItems.length, 1, "only one top level extension menu item should exist");
+
+  // Close the context menu.
+  yield closeContextMenu();
+
+  // Uninstall the extension.
+  yield extension.unload();
+
+  // Open the context menu.
+  contextMenu = yield openContextMenu("#img1");
+
+  // Confirm that no extension menu items exist.
+  topLevelExtensionMenuItems = contextMenu.getElementsByAttribute("ext-type", "top-level-menu");
+  is(topLevelExtensionMenuItems.length, 0, "no top level extension menu items should exist");
+
+  yield closeContextMenu();
+
+  yield BrowserTestUtils.removeTab(tab1);
+});