test.js

const puppeteer = require('puppeteer-extra');
const pluginStealth = require('puppeteer-extra-plugin-stealth');

(async () => {
    puppeteer.use(pluginStealth())
    const browser = await puppeteer.launch();
    const context1 = await browser.createIncognitoBrowserContext();
    const context2 = await browser.createIncognitoBrowserContext();
    const page1 = await context1.newPage();
    const page2 = await context2.newPage();
    await page1.goto('http://localhost:3000');
    await page2.goto('http://localhost:3000');
})();