Learn a Language: Passively is a free Chrome add-on developed by Scott Berger. This add-on allows users to learn a new language passively while browsing the web. By replacing words with the foreign language randomly on web pages, users can immerse themselves in the language they are trying to learn.

With Learn a Language: Passively, users have the option to choose the language they want to learn and customize the add-on to their preferences. The add-on also provides the ability to add your own dictionary of words or import them from a memrise.com page, making it easy to tailor the learning experience to your needs.

Additionally, users can select which sites they want the extension to operate on, allowing for a more targeted learning experience. Whether you're reading news articles, blog posts, or any other type of content, Learn a Language: Passively seamlessly integrates language learning into your everyday browsing activities.

Overall, Learn a Language: Passively is a useful Chrome add-on for language enthusiasts who want to learn a new language in a passive and convenient way. It offers customization options and operates on a wide range of websites, making it a versatile tool for language learning.