What's happening to me when using Chrome - be it mobile or desktop - is that I get a 403 when using another domain, i.e. not being logged in AND I'm having JS disabled by default. ¹

prohibited
You don't have permission to access this resource.
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Now the problem I see:

What about new users coming here with Chrome and no JS for the first time. Are they able to create a new account if all pages are prohibited?

Or am I missing something?

¹) not sure how this is related to the sec-ch-ua header.

update

so when checking headers in the console it looks like sec-ch-ua only appears when JS is on:

sec-ch-ua:   "Not A(Brand";v="8", "Chromium";v="132"
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so AnoMonks just need to make sure JS is activated or create a login when they want JS to be off.