A few days ago, Google has introduced a new version of ReCaptcha, theorically allowing most users to complete it by only ticking a checkbox. If the user isn't deemed as human by Google, the old version with distorted text appears. Although I used a normal Firefox version, I still had to fill the text captcha after clicking, so it didn't really worked for me. My curiosity induced me to look at the JavaScript in order to know how all this really works...
more here........https://github.com/ReCaptchaReverser/InsideReCaptcha#readme
more here........https://github.com/ReCaptchaReverser/InsideReCaptcha#readme