User Agent String explained :
Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 YaBrowser/20.12.3.138 Yowser/2.5 Safari/537.36

Download Yandex Browser 20.12.3.138
https://www.softpedia.com/get/Internet/Browsers/Yandex-Browser.shtml