this post was submitted on 17 Apr 2024
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[Support] Firefox 115.8.0 ESR is failing Cloudfare's captcha (sopuli.xyz)
submitted 7 months ago* (last edited 7 months ago) by SSUPII@sopuli.xyz to c/firefox@lemmy.ml
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Hello. For a couple of days my browser has been failing automated captchas when it is hosted by Cloudfare. Any other captcha service works well and lets me go trough.

This is happening on Firefox for Debian Linux 12 (apt). Doesn't happen on Firefox flatpak and Chromium apt.

What can I do to check further or to give more info?

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[–] SSUPII@sopuli.xyz 15 points 7 months ago* (last edited 7 months ago)

Found the problem in my case. I had a user agent changer addon let to fake Chrome 123 on Windows 10. DIsabled it and it worked.

[–] ReversalHatchery@beehaw.org 6 points 7 months ago (1 children)

Do you use privacy.resistFingerprinting? It's an about:config setting. Some CF sites don't like it

[–] SSUPII@sopuli.xyz 3 points 7 months ago (1 children)

Yes

[–] ReversalHatchery@beehaw.org 1 points 7 months ago

That's the reason probably, or at least one of them. You may try it out with that turned off, but it's if you don't want to turn it off

[–] kryllic@programming.dev 2 points 7 months ago

Same issue on latest version of LibreWolf