I have a technique:
- type a search on google.com
- captcha appears (it means this Tor circuit is blocked)
- go back to the previous page (google search box) (tip: you can alt+←)
- Switch Tor circuit (either though the hamburger menu – top right corner)
or through the shortcut ctrl+shift+L - If it works, your good. If not, continue with step 3.
It may take 10 attempts sometimes. It’s annoying and I don’t recommended it. But it’s a way to do it.