Is Simple Time Track safe?

Tracks task time from a browser side panel with start/stop timers and local storage.

This extension lets you run timers for tasks, track multiple tasks at once, organize them with project tags, estimates, progress bars, drag-and-drop ordering, and archiving. It supports CSV or JSON export and import, and offers language switching in English, Čeština, Slovenčina, and Deutsch. The description says tracking data is stored locally in the browser and does not use telemetry, analytics, cloud accounts, or third-party servers.