What the browser remembers
NetFilm uses browser storage for saved titles, manual series checkpoints, recently opened title pages, viewing-country choice and appearance preference. These features are local to the browser. There is no NetFilm account-sync feature connecting their values across devices. Clearing website storage can remove them, and private browsing may discard them when its session ends.
Your controls
Remove a saved title from its detail page, clear a checkpoint through its form, or remove recent-history entries using the history page's controls. If you want to keep your list before clearing browser data, create a text backup. That copy contains title references and checkpoints, so store it wherever you are comfortable keeping your viewing plans.
Images and destinations
Catalog artwork can load from TMDB's image service. Those requests connect your browser to that service. Watch now opens JustWatch, and following an offer can take you to a viewing provider with its own privacy practices, account requirements and settings. A NetFilm country preference selects a viewing region; it does not sign you into those services or transfer a saved list to them.
For practical list controls, open Watchlist or Recently browsed. Review an external service's own information when deciding whether to register or use its playback features.