I'm not sure that it makes any difference what system you use. On an Amazon Fire tablet, using the default browser (Silk), I usually only have to do the one-tick box "I'm not a robot" but, every so often, I have to jump through the hoops of selecting the correct squares from what are, on my device, small images, some of which contain only a miniscule portion of an object. Do I select or not? Annoying. I don't know if this is a necessary stratagem to deal with programs that can, by whatever means, locate the tick-box and deliver the spam.