Why Does Puppeteer Require Headless to Be False for Some Websites?

Why Does Headless Need to Be False for Puppeteer to Work?

While headless mode can be useful for automating tasks without opening a browser interface, certain websites employ anti-scraping measures that detect headless browsers.

Workarounds for Headless Mode Detection

• Use puppeteer-extra:

  • This library provides plugins such as puppeteer-extra-plugin-anonymize-ua and puppeteer-extra-plugin-stealth to anonymize the User Agent and evade headless detection.

• Run a "Real" Chromium Instance:

  • Launches a visible Chromium UI that Puppeteer can connect to instead of creating a headless instance.
  • Execute Chrome/Chromium with --remote-debugging-port=9222 and connect to it via await puppeteer.connect({ browserURL: ENDPOINT_URL });.

Additional Notes

• Headless mode detection techniques are constantly evolving.
• Other strategies for bypassing detection exist but may require more advanced technical knowledge.
• Inspecting the page's source code or network requests can provide valuable insights into possible anti-scraping measures.

Remember that web scraping should be ethical and respectful of website owners' terms of service.

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