[franky47]

What does the storage layer (database) contain? Clear-text, usable data, or encrypted randomness?

[abound]

Great question! I'd never actually checked, but opening up the SQLite database, it looks encrypted. I see a table `batch_upload_items` full of ciphertexts.

I'm running the old Python sync server for the time being.

[franky47]

It is indeed using end-to-end encryption: https://hacks.mozilla.org/2018/11/firefox-sync-privacy/