This doesn't make sense to me. Making reCaptcha work worse in FF without telling user that if he/she used Chrome it would be better. Only few tech savvy people

This doesn't make sense to me. Making reCaptcha work worse in FF without telling user that if he/she used Chrome it would be better. Only few tech savvy people (hn readers), will eventually realize that. And it doesn't make them to switch to Chrome (or does it?). They'll just be angry. And btw I hate reCaptcha. Is it really only option to fight with spam? When I see it on sites, like dhl parcel tracking, I get mad. I always ask why? Can they just block suspicious traffic, or at least not display captcha on first attempt.