cfg.engines is undefined refresh@moz-extension://e711922d-ce2c-4762-9af7-aab79d51d340/js/popup.js:311:26 close@moz-extension://e711922d-ce2c-4762-9af7-aab79d51d340/js/popup.js:407:14 @moz-extension://e711922d-ce2c-4762-9af7-aab79d51d340/js/popup.js:827:11