message: Added a preliminary check before polling
diff: @@ -91,6 +91,9 @@ window.addEventListener('load', () => {
  });
  });
  +/** @desc When MetaMask is loaded as an extension, watch for network changes. */
  +if ((window as any).web3) {
  setInterval(handleMetaMaskPolling.bind(null, store), METAMASK_POLLING_INTERVAL);
  +}
  export default store;
  