This is a shot in the dark but I will try anyway.
Many years ago I used Songbird/Nightingale as my music player. It was open source and based on the same software as Firefox. Here are links for reference.
The UI itself had no way to view your playback history(that I could see), but it did show a play count for each song in your library. I still have the SQLite databases from my install of it, so I opened them up in an SQLite browser and it did in fact track every play with a timestamp and duration of playback. But the structure of the database is too much for me to wrap my head around. I can do simple databases, but without a diagram explaining the structure I’m lost with stuff like this.
Anyway my question. Does anyone have an experience with this software, and maybe happen to have a script to export the playback history into a format that could be imported into ListenBrainz? I have 6 years and almost 19,000 entries I could import predating my last.fm data I already imported.