你打开两个浏览器和两个页面，因此你得到两个页面。
只需重复使用相同的浏览器和页面（即浏览器选项卡）即可导航到下一页：

let openbrowser = async () => {
  // initialize:
  const browser = await puppeteer.launch({ headless: false, });
  const page = await browser.newPage();
  await page.setViewport({ width: 1280, height: 800, isMobile: false, });

  // load first page:
  await page.goto("https://youtube.com/");
  // do stuff with this page, such as: await page.screenshot()

  // navigate to next page:
  await page.goto("https://www.youtube.com/results?search_query=avatar");

  // after all done:
  await page.close();
  await sleep(2000);
  await browser.close();
};

(async() => {
  openbrowser();
})();

• • 更新**

您可以将这段代码拆分为函数，只需传递page对象即可：

const loadPage1 = async (page) => {
  await page.goto("https://youtube.com/");
  // do stuff with this page, such as: await page.screenshot()
};

const loadPage2 = async (page) => {
  await page.goto("https://www.youtube.com/results?search_query=avatar");
  // do other stuff
};

let browser;
(async() => {
  // initialize:
  browser = await puppeteer.launch({ headless: false });
  const page = await browser.newPage();
  await page.setViewport({ width: 1280, height: 800, isMobile: false });

  loadPage1(page); // load first page
  loadPage2(page); // navigate to next page

  // after all done:
  await page.close();
  await sleep(2000);
})()
  .catch(err => console.error(err))
  .finally(() => browser?.close());