Guesses: VPN, AdBlocker, Browser profile spoofer (chameleon extension f.e.), fingerprinting protection (Firefox's or from extension). If you have something from this list, try to disable it and go to site.
Firefox
A place to discuss the news and latest developments on the open-source browser Firefox
VPN alone shouldn't be affecting Cloudflare turnstiles, but any extension meddling with the user agent and headers will. You're on the right track.
Ding ding ding! User agent switcher addon. See my post edit.
Close, it was a user agent switcher addon. Look at my post edit.
im using librewolf with a few plugins, and when this happens, i just disable useragent switcher (or add the site to the whitelist) and it works
Yep, check my edit. It was caused by a user agent switcher addon.
are you sure you aren't using any addons that influence it? like Jshelter or canvasblocker?
No it was a user agent switcher addon. But now I want to check these out 😂!
they are great to prevent fingerprinting, you can test your browser here, but will require some fiddeling e.g. enable java for content sites like YouTube or they don't work.
Thanks!