How to check if “guest mode” works?

you can enable “preserve log” in browser dev tool and check the request list

first request will give you guest mode in html comment , and then refresh the page , the 2nd loaded page won’t have this comment

Thank you for your answer but I can’t find it.

it should be like this

The name of the first request when you first enter the website is the domain address. Same for the second entrance.

then it indicates the guest mode is working

This seems strange to me.

well, it is how guest mode works…