Heads up: vicinae collects telemetry data since 0.20.6, with a generated unique identifier for each installation. The author refuses to add a popup notice on startup to ensure GDPR compliance and address users' concern, while claiming to meet the minimum requirements for "Lawfulness of processing".
https://github.com/vicinaehq/vicinae/issues/1218
Our NixOS maintainers have turned this off by default.