Real browsers send it. [1] Some of the reader apps do not. Most bots aside from those utilizing Chrome Headless do not. People can see a few headers here [2]

Real browsers send it. [1] Some of the reader apps do not. Most bots aside from those utilizing Chrome Headless do not. People can see a few headers here [2] [1] - https://caniuse.com/?search=sec-fetch-mode https://caniuse.com/?search=sec-fetch-mode [2] - https://nochan.net/.env https://nochan.net/.env