test-addon-manager.js

// INSTALL THE ADD-ON

let data = {
  noscript: {
    id: '{73a6fe31-595d-460b-a920-fcc0f8843232}',
    installURL: 'https://addons.mozilla.org/firefox/downloads/latest/722/addon-722-latest.xpi?src=dp-btn-primary'
  },
  mutetabs: {
    id: 'mute-all-inactive-tabs@evilpie.tomschuster.name',
    installURL: 'https://addons.mozilla.org/firefox/downloads/file/394320/mute_all_inactive_tabs-0.1.1.xpi?src=ss',
  }
}


function logEvent(e) {
  console.log(e);
}


function install(name) {
  return window.navigator.mozAddonManager.createInstall({url: data[name].installURL})
    .then(installobj => {
      installobj.addEventListener('onDownloadStarted', logEvent);
      installobj.addEventListener('onDownloadProgress', logEvent);
      installobj.addEventListener('onDownloadEnded', logEvent);

      installobj.addEventListener('onInstallStarted', logEvent);
      installobj.addEventListener('onInstallFailed', logEvent);
      installobj.addEventListener('onInstallEnded', logEvent);
      installobj.addEventListener('onInstallCancelled', logEvent);

      installobj.addEventListener('onExternalInstall', logEvent);
      installobj.install();
      return installobj;
    });
}

// CHECK ITS THERE

function lookup(name) {
  return window.navigator.mozAddonManager.getAddonByID(data[name].id)
    .then((addon) => { 
      if (!addon) {
        console.log('no add-on found');
      } else {
        console.log(addon);  
      }
    });
}

// UNINSTALL THE ADD-ON
function uninstall(name) {
  return lookup(name)
    .then((addon) => { 
     return addon.uninstall()
    });
}