content: import React from 'react';
  import { render } from 'react-dom';
  import Root from 'app/containers/Root';
  
  chrome.runtime.getBackgroundPage(background => {
    const { store, unsubscribe } = background.getStore();
    render(
      <Root store={store} />,
      document.getElementById('root')
    );
    addEventListener('unload', unsubscribe, true);
  });
  