Electron 31 supports tabbed windows for MacOS: https://www.electronjs.org/docs/latest/api/browser-window#winaddtabbedwindowbrowserwindow-macos

we can combine with setWindowOpenHandler https://www.electronjs.org/docs/latest/api/web-contents#contentssetwindowopenhandlerhandler

Example:

mainWindow.webContents.setWindowOpenHandler(() => {
return {
  action: 'allow',
  createWindow: (options) => {
    const browserWindow = new BrowserWindow(options);
    mainWindow.addTabbedWindow(browserWindow);
    browserWindow.setBounds({ x: 0, y: 0, width: 640, height: 480 });
    return browserWindow.webContents;
  },
};

});