Looking for a way to automate hcaptcha solving in Firefox 5.9

Hi, is there a way, extension, or an API than can automatically solve hcaptcha in Firefox 5.9?

I tried anti-captcha.com plugin, but it doesn't work in this version of Firefox. 2captcha doesn't have an extension for Firefox, and deathbycaptcha doesn't have an extension at all.

Any help is appreciated.

Thanks.