I have purchased large collection of spoken word as MP3s (62 MP3s, originally on 8CDs) with rich metadata, so I would like to simplify submission as much as possible. When clicking on the cluster with the tracks and selecting "Submit cluster as release" new tab in my Firefox opens, but no data are filled in at all.

When I looked around my drive, I found the attached file in `/tmp/` (which seems rather promising and at least that data would be lovely to have submitted automatically), but all forms on the web page are empty.

Using Picard from Flatpak:

MusicBrainz Picard - MusicBrainz's music tagger

          ID: org.musicbrainz.Picard
         Ref: app/org.musicbrainz.Picard/x86_64/stable
Architektura: x86_64
       Větev: stable
       Verze: 2.8.5
     Licence: GPL-2.0-or-later
       Původ: flathub
     Kolekce: org.flathub.Stable
   Instalace: user
 Instalováno: 58,7 MB
   Prostředí: org.kde.Platform/x86_64/5.15-21.08
         Sdk: org.kde.Sdk/x86_64/5.15-21.08      Commit: 790e00c4c2722ec6ada6fd1394316aa49bceee2a54705ff81868868395acf380
       Rodič: c1da63c81f3599b9e1728d2b627ed50356d8f86676e5ada7aa560ead072553b4
     Předmět: Update numpy-1.24.2.tar.gz to 1.24.3 (3fd948ed)
       Datum: 2023-04-23 01:46:56 +0000