How does Yandex authorization work?

Question

PHP

How does Yandex authorization work? I mean almost eternal authorization. I found information that the data is written in cookies, a period is set and that's it. This method works with a bang on a desktop browser, but not in a mobile browser. Why? Many sites store user data for months, for example Yandex, whether it is a desktop browser or a mobile one.

Answer 1

cookies work on mobile browsers too

Answer 2

More information!
What is the axis, the browser?
And what doesn't work the way it should?

Answer 3

You set cookies for a very long time. And on each domain (if there is a separate subdomain for the mobile version)