LSJ Ancient Greek Lookup is a Firefox extension designed for efficient access to multilingual dictionaries. Users can quickly look up Ancient Greek and Latin words by employing various methods, including ALT+double-clicking, right-click context menu options, or using the extension icon. This tool offers seamless integration with lsj.gr, facilitating a user-friendly experience for language learners and scholars alike.

The extension supports lexicographic content in multiple languages, including English, Ancient Greek, Modern Greek, German, French, Spanish, Russian, Dutch, Latin, and Chinese. Additionally, it provides terminological content in over 5000 languages, ensuring comprehensive translations and insights. Users can choose to open results in a new tab or refresh an existing lsj.gr tab, enhancing workflow efficiency for research and study.