UseStudio.Browers/resources/app/node_modules/electron-is-dev/index.js

'use strict';
const getFromEnv = parseInt(process.env.ELECTRON_IS_DEV, 10) === 1;
const isEnvSet = 'ELECTRON_IS_DEV' in process.env;

module.exports = isEnvSet ? getFromEnv : (process.defaultApp || /node_modules[\\/]electron[\\/]/.test(process.execPath));