The modern implementation of reCaptcha is quite possibly the worst plague of the internet. If you're using Tor or any non chrom*-based browser, you're out of luck. Piece of garbage really should have been decommissioned by now.
I believe I have pretty good tracking protection and it's been working fine for me.
Before I found the extension on HN a few months ago, I hated recaptcha. Every site using cloudflare was pain in the ass.
Not only does it make 1-click validations possible, it slashes the number of recaptcha requests (for me).
It's only failed me once. Google said I was using automates captcha solvers. Went offline for a while and voila.