Save in the game
Use the game’s save command before quitting. A page reload is not an instant save. Profiles are local to this domain, browser profile and device.
Export a backup
Quit through Player options. After the runtime closes, choose Export saves to download a .json backup with file checksums. Keep a copy somewhere safe.
Restore a backup
Choose Import saves while no game is running. The selected file is validated locally before restoring. Restore replaces current local save files. Only use backups exported by this player.
Download cache is separate
Clear downloaded files leaves save profiles intact. Clearing all site data in the browser can delete both. This version has no cloud-save synchronization.