[Question] How to know that browser is opened with Puppeteer

Is there a way to know (from page’s JS) that the browser is running with Puppeteer? I saw the tip to check for headless string in userAgent, but I’m running with headless: false (testing extension). I’d like to switch some features if the extension is run in tests.

[aslushnikov]

@skyiea you can launch chrome with a custom user agent:

const puppeteer = require('puppeteer');

(async() => {

  const browser = await puppeteer.launch({
    args: ['--user-agent=hhh'],
  });
  const page = await browser.newPage();
  console.log(await page.evaluate(() => navigator.userAgent));
  await browser.close();
})();

Hope this helps

[yujiosaka]

@skyiea How about setting a user agent like ‘puppeteer’, so that you know from window.navigator.userAgent ?