Yandex.Browser is updated automatically irrespective of whether you use it or not. This is for security reasons: new threats and vulnerabilities constantly arise in the internet and the browser gets new and better protection methods.
We do not recommend disabling automatic update in the background, but if you need to:
In the lower part of the Settings page, click the Show advanced settings button.
Now automatic update in background is disabled. However, as soon as you open the browser, it immediately checks for updates and will do so regularly in the future when running.
It is not possible to completely disable automatic update in the browser. We recommend using the latest browser version to get maximum protection from internet threats.