D-ray is a free Chrome add-on developed by Plumes that provides users with the Blu-ray release dates for movies on Douban, a popular Chinese movie review and rating platform. This add-on specifically displays the release dates for movies on their respective Douban pages, using data obtained from blu-ray.com.

One of the key features of D-ray is its ability to provide accurate release dates for Blu-ray versions of movies. This is particularly useful for movie enthusiasts who are interested in purchasing or collecting Blu-ray discs. However, it is important to note that currently, D-ray only supports European and American movies, and cannot provide accurate data for movies from Japan, South Korea, or China.

Overall, D-ray is a handy Chrome add-on for movie lovers who want to stay updated on Blu-ray release dates for movies on Douban. Although it has some limitations in terms of supported movie regions, it provides valuable information for those interested in the Blu-ray format.