old_contents: const electron = require('electron')
  const app = electron.app
  const BrowserWindow = electron.BrowserWindow
  const path = require('path')
  const url = require('url')
  
  // Keep main window in scope so it isn't garbage collected
  let mainWindow
  
  function createWindow () {
    mainWindow = new BrowserWindow({ width: 1000, height: 750 })
    mainWindow.loadURL(url.format({
      pathname: path.join(__dirname, 'index.html'),
      protocol: 'file:',
      slashes: true
    }))
  
    mainWindow.webContents.openDevTools()
  
    mainWindow.on('closed', function () {
      mainWindow = null
    })
  }
  
  app.on('ready', createWindow)
  
  app.on('window-all-closed', function () {
    if (process.platform !== 'darwin') {
      app.quit()
    }
  })
  
  app.on('activate', function () {
    if (mainWindow === null) {
      createWindow()
    }
  })
  
new_contents: const electron = require('electron')
  const app = electron.app
  const BrowserWindow = electron.BrowserWindow
  const path = require('path')
  const url = require('url')
  
  // Keep main window in scope so it isn't garbage collected
  let mainWindow
  
  function createWindow () {
    mainWindow = new BrowserWindow({ width: 1000, height: 750 })
    mainWindow.loadURL(url.format({
      pathname: path.join(__dirname, 'index.html'),
      protocol: 'file:',
      slashes: true
    }))
  
    // mainWindow.webContents.openDevTools()
  
    mainWindow.on('closed', function () {
      mainWindow = null
    })
  }
  
  app.on('ready', createWindow)
  
  app.on('window-all-closed', function () {
    if (process.platform !== 'darwin') {
      app.quit()
    }
  })
  
  app.on('activate', function () {
    if (mainWindow === null) {
      createWindow()
    }
  })
  
subject: Disable dev tools for now.