I've used it for years without problem, but recently I have been unable to complete "verify you are human" challenges on Cloudflare-protected sites, I kept getting stuck in an infinite verification loop.
After disabling/enabling all my extensions one by one, I figured out this the problem is caused by this add-on. I'm hoping that problem can be fixed by the developer, than I will happily go back to using it again and give a better rating.