Try the audio captcha, those seem to have actual valid answers to them.
Funny enough, there's an extension that solves captchas by feeding that audio through a speech recognition algorithm. If anything it's more reliable than solving them manually
Yes, Buster Captcha Solver extension (in GitHub, Firefox, Chromium), but there are novadays also several others, which works in all type of capchas, using AI. Because of this, Captchas are obsolet since years, turning simply in annoying clickbaits. They can't avoid bots anymore.
Well, but still works fine in reCaptchas (these are also not updated since a long time) I think it's still valid, if you don't use it frequently. If not, as said before, there are several alternatives which work with AI,