Yandex Evolution - addon for Firefox helps search via Yandex search site

https://addons.mozilla.org/en-US/firefox/addon/яндекс-поиск-yandex-search/

Hi! I made some Firefox addons for myself. You can use it for free. But I will be glad if you support the development of my projects. Thanks!

https://addons.mozilla.org/en-US/firefox/user/16521499/