lbry-desktop/static/pwa/serviceWorker.js

if ('serviceWorker' in navigator) {
  navigator.serviceWorker.register('./public/pwa/serviceWorker.js').then(function(reg) {
    // console.log('Successfully registered service worker', reg);
  }).catch(function(err) {
    // console.warn('Error whilst registering service worker', err);
  });
}