[0xff00ffee]

How can someone demonstrate this claim?

reCaptcha is wildly sophisticated under the hood[1]. I use it on all three major browsers and find the number of challenges varies from 0 to 4: sometimes it says I'm verified without doing anything, other times I need to go through 4 screens.

I would love to see someone put some numbers behind this claim, because I think it is false.

[1] https://www.blackhat.com/docs/asia-16/materials/asia-16-Siva...

EDIT: Are you downvoting because you don't like reCaptcha, or because you can't (or won't) set up an experiment to demonstrate this claim and prefer to just jump on the bandwagon?

[zaarn]

I've experienced reCaptcha simply looping forever. After solving 5 or so screens, I give up and hope that reloading the page works. If not I usually switch to Chromium, which doesn't even get a single puzzle, just verified.

That is my repeatable experience as the end user.

[hedora]

Same here. It seems to randomly freak out and block firefox.

I get why Firefox won’t sue Google. I wish end users would.

[greglindahl]

My heavily adblocked FF has a lot of trouble with recaptcha, while the Chrome instance that I only use for logged-in Google and LinkedIn doesn't. It seems like there are enough moving parts that it would be hard to figure out why our anecdotes are so different.