Qubes OS web browsing gets blocked by anti-spam filters

I installed QubesOS around a month ago.

I noticed that some websites automatically flag my browser as a bot, often in a non-recoverable way (i.e. I don’t even have the option to solve a captcha).

Those websites were working fine before on the same computer with a different OS (ubuntu), and using a VPN / a new VM does not bypass the detection.

It’s becoming a big pain point since some of those websites are very important, e.g. my national platform to buy train tickets…

How should I get around this ?

(typical setup: firefox-esr on debian-13-xfce)

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That may be because theses websites are using advanced fingerprint techniques to block bots, and your Firefox is slow to resolve GPU computation due to the lack of graphical acceleration+ running in a VM and maybe other unusual parameters, this may be enough for that system to categorise you as a non standard user and be blocked.

This is pure speculation of course, but knowing a bit about these tools, I wouldn’t be surprised.

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I tried increasing CPU and memory, as well as loading the website in a VM with GPU passthrough, but unfortunately the detection remains the same.

Here’s actually a link that is easy to check: https://chat.qwen.ai/.
Every time I load this link (on any VM, private navigation or not), I am greeted with a never-ending captcha loop (i.e. each time I fill it a new one appears). Is it only me, or does it happen to other QubesOS users ?

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I cant say this is just you, but I know people who use this - over Tor
there are more sliders, but you can work through those. I do not think
this is Qubes specific.

I never presume to speak for the Qubes team.
When I comment in the Forum I speak for myself.

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For anything that requires KYC/AML payment methods, I use a proxy service to complete the transaction on my behalf.

I am getting the same issue dragging a bunch of puzzle pieces around. If you want an alternative suggestion for an AI service, I can provide one.

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Antidetect‑appVM with FOSS Antidetect Browsers. Windows fingerprint. Random fingerprint in dvm worked for me as a workaround.

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No issues here to open that site with Firefox ESR (v147.0.4) in my “untrusted” AppVM.

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Apparently that link is working for me as well now, even though it was not previously.

works with Camoufox, Wayfare and disposable fedora firefox

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I tested with firefox and brave-browser on two different OS the link is opening fine the issue is probably because they see your vpn ip as a bot something like that

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Hm after further investigation indeed the website mentioned above now load fine even in a normal VM w/ ffox. I guess they changed something in their bot detection framework.

Will report back if I have more issues even with Donut Browser.

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