Subadub is a free Chrome add-on developed by Russel Simmons that enhances Netflix subtitles for foreign language study. This add-on displays subtitles as selectable text, allowing users to easily copy and paste them for creating flashcards or looking up words in a dictionary. It also supports popular extensions like Yomichan or Rikaikun for Japanese language learners.

One of the key features of Subadub is the ability to download full subtitles for a video in SRT format. This is particularly useful for personal study and review, as users can access the subtitles offline and at their own pace. With Subadub, language learners can enhance their Netflix experience and make the most out of foreign language content.