letterboxd-extras-backup-2024_9_3 15_43_59.json is a dated settings backup from the Letterboxd Extras browser extension. Its settings object is empty; only version and timestamp metadata are populated. It is not live browser state and cannot presently restore any preferences.
No browser-profile link or automatic import is recorded here. To obtain a useful current backup, export one through Letterboxd Extras and keep the dated filename unless there is a deliberate decision to replace the old snapshot.
Run jq empty on a new backup and confirm that its top-level settings,
timestamp, and version fields are present. If its settings object is populated,
restore it in the extension and check representative Letterboxd pages. The
current file contains metadata, not credentials.