I always love when I come across a website using Google's reCAPTCHA v3. Usually they have it on their register page, and I get a confusing error message because I didn't pass it and the website owners put no option to do anything about it or prove my humanity in any way. Then I try the same thing on Chromium instead of Firefox and magically it lets me pass.
The internet used to be complicated requiring institutional knowledge about where to go and how to make things work, then it became simple, now it's back to becoming complicated requiring institutional knowledge about how to make things work.