gistfile1.txt

/* 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 { utils: Cu, interfaces: Ci, classes: Cc } = Components;
Cu.import("resource://gre/modules/AddonManager.jsm");
Cu.import("resource:///modules/CustomizableUI.jsm");

let gUpgrade;

function startup(data) {
  AddonManager.addUpgradeListener(data.instanceID, upgrade => {
    gUpgrade = upgrade;
  });
  CustomizableUI.createWidget({
    id: "delay_upgrade",
    defaultArea: CustomizableUI.AREA_NAVBAR,
    label: "Delay Upgrade",
    tooltiptext: "Delay Upgrade",
    onCommand: function(aEvent) {
      if (gUpgrade) {
        console.log("postponed upgrade is pending, applying it now.")
        gUpgrade.install();
      } else {
        console.log("no postponed upgrade is pending.")
      }
    }
  });
}

function shutdown(data) {
  AddonManager.removeUpgradeListener(data.instanceID);
  CustomizableUI.destroyWidget('delay_upgrade');
}
function install() {}
function uninstall() {}