For a long time, it was limited to Chromium browser. Since a little while now, it was finally brought to Firefox. The extension brings so much features that the Discogs community have asked for years but were never brought at all by the devs and thsi addon does exactly that.

Also please note that, because of the cheer amount of work needed to maintain the extension, the author plans to add a small subscription model for the marketplace features (2$/m or 10$/y) since they are the features being changed the most by Discogs.

When I wrote this review (23-08-2025), the subscription changes weren't live yet. At least, if they were, not on Firefox.