What version of Yandex Browser do I have?
You're not using Yandex Browser right now, you're using CommonCrawl Crawler Node 2.0.
That doesn't necessarily mean you don't also have Yandex Browser installed on your server, but it does mean that you're not using it right now.
If you want to find out what version of Yandex Browser you have; open and use it to revisit this page - then we'll be able to tell you what version of Yandex Browser you've got.
If you have any more questions, use the contact form - we'll answer it and include it here too.