How does Yandex identify a device (computer)?

Question

Yandex

Recently (computer PC x86, Linux) in the Firefox browser I was looking for some details for the kitchen in the Yandex search engine, then I closed it and launched another Chrome browser, went to Yandex weather and was surprised to see in all three (there were 3 in total) banners advertising companies selling kitchens .
Both browsers are configured to go through different proxy servers.
From here I have an unambiguous conclusion that Yandex can uniquely identify the device from which you use its services.

Questions:
1) with what (how) does he do it (technology)?
2) how to prevent it? change identification?
3) will the virtual machine, containers, etc. help with this?

Answer 1

Found the answer on the Wiki
"By the beginning of 2017, the fingerprint was limited to the browser used, thus it was easy to change the fingerprint by changing the browser. In 2017, the cross-browser fingerprint method was published, [5] allowing you to follow the user from different browsers on the same device. "