I'm seeing the CAPTCHA a lot with the Brave Browser Tor Tab. You might want to reach out to the developers to make their Tor Tab be treated the same as the Tor Browser Bundle.
That's what I thought. However, using Tor browser in Whonix, I've recently faced Google CAPTCHAs that require scripting to pass. For both account creation and login.
In future, I'll report CAPTCHAs with Tor browser to Cloudflare. But I can imagine that other CDNs use Google CAPTCHAs, so I'll check for that first.
Yeah tails was so broken with CloudFare I had to give up on it. Many sites showed the annoying captcha and, if you got past that, still refused to show content because it was presumably served from a separate domain. If you looked at source and copied the urls to the images and tried to open them directly you got another CloudFare captcha.
I couldn't see it in the list of extensions there. I saw a ticket filed that said that there are various arguments against including it, one of them being that it's not the responsibility of the user to install some extension in order to get unblocked, it's the responsibility of the provider to not block users.
If you are using the Tor Browser Bundle you should not see a CAPTCHA. If you do please report it to us.