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For what it's worth, Anubis supports LibreJS: https://github.com/TecharoHQ/anubis/blob/main/web/build.sh#L...
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Anubis does support the no-JS HTTP meta-redirect proof of work but few know about it and fewer enable it. And it may not block everything.
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I indeed did not know about this. There seem to be some caveats:

https://anubis.techaro.lol/docs/admin/configuration/challeng...

I guess for the meta refresh challenge it's less "proof of work" and more "proof of patience".

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The meta refresh challenge actually uses time as the proof! It makes sure you wait for at least 75% of the time the administrator configured and adds client side smear to ensure that browser temporal randomization doesn't trigger a false failure.
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