Ted Dual Subtitles is a Chrome extension developed by robertkao5656 that allows users to enable dual subtitles for TED Talks. With this extension, users can select a second subtitle language from a choice of four supported languages. The extension generates the dual subtitles locally and then loads them to display alongside the video.

One of the main features of Ted Dual Subtitles is the ability to change the font size of the subtitles, allowing users to customize their viewing experience. Additionally, the extension supports showing English subtitles on the TED website, which is particularly useful for language study purposes.

However, there are a few important points to note. Firstly, the TED video being watched must already have English subtitles available. Secondly, users need to enable subtitles for the video in order for the extension to work properly. It's worth mentioning that online translation of the subtitles may take some time, especially for longer videos. Users can check the progress of the translation by looking at the "Download Count" - a count of 0 indicates that the translation is complete. If the count is not visible, users are advised to refresh the browser to resolve any data retrieval issues.

Overall, Ted Dual Subtitles is a valuable Chrome extension for TED Talk enthusiasts who want to enhance their viewing experience by having dual subtitles. It provides a convenient way to study languages and offers customization options for subtitles.