[Support] Firefox 115.8.0 ESR is failing Cloudfare's captcha (sopuli.xyz)

submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]

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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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[-] [email protected] 15 points 5 months ago* (last edited 5 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.

[-] [email protected] 6 points 5 months ago

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

[-] [email protected] 3 points 5 months ago

Yes

[-] [email protected] 1 points 5 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

[-] [email protected] 3 points 5 months ago

I was on IceCat, which is using Firefox ESR 115.9.1, and it had the same issue. I had to disable JShelter's Javascript Shield and Fingerprint Detector.

[-] [email protected] 2 points 5 months ago

Same issue on latest version of LibreWolf

this post was submitted on 17 Apr 2024

21 points (92.0% liked)

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