Does Yandex or Mail.ru pay browsers?

Question

Browsers

Hello! Who has information about whether Yandex or Mail.ru, for example, pays the Mozilla Firefox browser so that the search engine is Yandex by default?

Answer 1

Yes. And not only them, all operating systems that have certain browsers available during installation.
Mobile OS for example. + some more devices in which the browser is embedded.
All of them must buy a license to use.
how do browsers make money

Answer 2

Certainly