Different work of headless mode

[lusy777]

I noticed different work when I'm calling $browserFactory->createBrowser() with/without 'headless' => false
With 'headless' => false appeared chrome window with load page and return full html page, but without this option I see in html response "..You don't have permission to access.. "
I thought both modes were supposed to work the same?

[enricodias]

Probably the website is identifying the headless mode and changing its behaviour.

[lusy777]

Is there any trick to fool this identifying?

[enricodias]

You can try tweaking the things that this tool checks for to detect headless: https://github.com/infosimples/detect-headless