I was curious about the CAPTCHA solving, too, so I tested WebVivum out on ~8 reCAPTCHAs.[1] It solved all except 2 of them, taking 20-60 seconds each time. In 2 cases it reported failing to solve the CAPTCHA, but it never gave an incorrect result. That is, whenever it gave a solution the solution was correct (in my brief test).

So, while it's some way off their claim of "instant" CAPTCHA solving, this is definitely a very useful addon, especially for those people who cannot solve CAPTCHAs at all. Thank you for pointing it out.

[1]https://www.webscript.io/examples/recaptcha