I was about to rate it 4-stars because I was annoyed with the auto-play, but luckily I found the developer's comment. The settings can be accessed at the right of the address bar on your browser when viewing the Discogs marketplace. Kudos Phatbyte!

If I might make a couple suggestions, I'd love there to be a feature that allows me to "auto-next" to the next release. Either that, or auto-add everything on the visible page to the playlist so I can just open a browser window and let it play without having to click the next release's preview button.

Also, it might be cool to implement an adjustable max-playtime, so it plays each song for only a certain amount of time. For instance, if you're browsing through Ricardo Villalobos' discography, you're going to come across a ton of 15-20 minute songs. This feature would add the ability to play each song for a much shorter duration (like, 2 minutes).