Yandex.Browser uses its own integrated security system called Protect, which includes scanning downloaded files for viruses, blocking infected and fraudulent websites and shocking advertising, and securing Wi-Fi connections, user passwords, and browser settings.
Yandex.Browser scans everything for viruses. If, according to our data, a file may present a threat, the browser displays a warning on the download bar.
For more information, see the section Protect: protection from malicious pages.
The security mechanism in Yandex.Browser doesn't conflict with other security applications (anti-virus software and firewalls). It's worth bearing in mind that it does not guarantee complete protection of your computer from modern Internet threats. For full security, we recommend using fully-functional antivirus products.
You can't do this directly in the browser.