The program 'Google: Кнопка поиска Яндекс Mail.ru и др.' is a Firefox extension designed to enhance the search functionality on Google. It adds a convenient button above search results, allowing users to execute the same query across multiple search engines. This extension supports nine popular search engines including Yandex, Bing, Yahoo, Mail.ru, Aol, Rambler, Excite, Ask, and DuckDuckGo, providing users with a comprehensive alternative search experience.

With a subscription-based license, users can customize their search experience by selecting their preferred search engine from the options page. Additionally, the extension offers 12 different styles for the button, allowing for a personalized aesthetic that fits the user’s browsing style. This tool is ideal for individuals who frequently compare search results across different platforms.