You are not Chrome headless
This page runs a simple test to determine whether or not you are Chrome headless. For research purpose, I also collect a more complex browser fingerprint. It does not use detection any of techniques presented in these blog posts (post 1,post 2) or in the Fp-Scanner library. Known spoofing/escape techniques such as the ones presented in this repository are totally useless. Since I use a simple test and don't try to correlate its value with other known tests, false positives/negatives may occur on less popular browsers. Under the hood, I only verify if browsers pretending to be Chromium-based are who they pretend to be. Thus, if your Chrome headless pretends to be Safari, I won't catch it with my technique, but because of the differences, it could be easily caught using many other techniques.