The passwords were not there. Downgrading to an older version of Firefox (I tried 39) shows the saved passwords once again.
I decided to try and track this down using a clean environment and new Firefox profile. Specifically in a freshly spun up Windows 7 64-bit SP1 virtual machine. I copy these three files to a newly created Firefox profile:
- key3.db
- key4.db
- logins.json
I think there is some migration process that's failing to kick off. How can I "force" it?
Things I already tried:
- the suggestion to reset "signon.importedFromSqlite"
- removing "pkcs11.txt"
- removing "key4.db"