Thank you for the review.

I suppose you are using Linux? Firefox on Linux has a bug that prevents "download a file" functionality from working. As a workaround, Feedbro just opens the feed subscriptions data in a separate tab. You need to right-click the area and select "Save As" to save your subscriptions to the disk.

PS. Our official support email is [email protected] - all issue reports and feature requests are welcome there.