Add a menu to Fennec's tools menu (?) - now with a full working example.

tools-menu-hack.js

const utils = require('sdk/window/utils');
const recent = utils.getMostRecentBrowserWindow();

// Assume NativeWindow is a global
function showToast() {
  recent.NativeWindow.toast.show("Showing you a toast", "short");
}

var menuID;
 
function addMenuItem() {
  menuID = recent.NativeWindow.menu.add({
    name: "Show Toast",
    icon: null,
    parent: recent.NativeWindow.menu.toolsMenuID,
    callback: function() {
      showToast();
    }
  });
}
 
function removeMenuItem() {
  recent.NativeWindow.menu.remove(menuID);
}

addMenuItem();

exports.onUnload = function() {
  removeMenuItem();
};