如果您希望使用更多选项卡

您需要一个浏览器示例和多个页面。

(async () => {
    const browser = await puppeteer.launch({headless: 'new'});

    const bingPage = await browser.newPage();
    const googlePage = await browser.newPage();

    await googlePage.setViewport({width: 1080, height: 1024});
    await bingPage.setViewport({width: 1080, height: 1024});

    Promise.all([
        googlePage.goto('https://google.com').then(async () => {
            await googlePage.screenshot({path: 'google.jpg'})
        }),
        bingPage.goto('https://www.bing.com').then(async () => {
            await bingPage.screenshot({path: 'bing.jpg'})
        })
    ])
        .then(() => browser.close())
        .catch(console.error)
})();

如果您需要多个浏览器示例

(async () => {
    const browser1 = await puppeteer.launch({headless: 'new'});
    const browser2 = await puppeteer.launch({headless: 'new'});

    const bingPage = await browser1.newPage();
    const googlePage = await browser2.newPage();

    await googlePage.setViewport({width: 1080, height: 1024});
    await bingPage.setViewport({width: 1080, height: 1024});

    googlePage.goto('https://google.com').then(async () => {
        await googlePage.screenshot({path: 'google.jpg'})
        await browser1.close()
    }).catch(console.error)

    bingPage.goto('https://www.bing.com').then(async () => {
        await bingPage.screenshot({path: 'bing.jpg'})
        await browser2.close()
    }).catch(console.error)
})();

另请查看this question如何运行多个示例