Gvozd

mainWindow = new BrowserWindow({
  webPreferences: {
    nativeWindowOpen: true,// window.open return Window object(like in regular browsers), not BrowserWindowProxy
    affinity: 'main-window'// main window, and addition windows should work in one process
  }
});

mainWindow.webContents.on('new-window', function (e, url, frameName, disposition, options) {
  // hook on new opened window