#DHSeaDev — Privacy Policy
Cobalt Star Idle Privacy Policy
Chrome extension, version 1.0.0 and later. Last updated October 17, 2026.
What the extension stores
All of the following is saved with Chrome’s chrome.storage.local on your own computer. It is not sent anywhere and Chrome does not sync it to other devices.
- Your game save: stars lit and their levels, resources, prestige progress, Attendant and Calculator settings, the receipts ledger, quests, and your settings (theme, layout, sound, notifications).
- A panel-open heartbeat timestamp, so the background worker knows when to count offline progress.
- A one-slot copy of your previous save, kept only if you import a save (it powers “Undo last import”), and a raw copy of a save the game could not read, kept so it is not lost.
Uninstalling the extension removes this data. Hard reset in Settings erases all of it immediately.
What the extension does not do
- It does not collect, transmit, sell or share personal information, browsing history, page content or usage data.
- It requests no website access (no host permissions) and does not read or change the pages you visit.
- It has no analytics, telemetry, crash reporting, advertising or third-party services, and loads no remote code. Art and sound are generated inside the extension.
- It has no accounts and no purchases.
Permissions and why
| Permission | Why it is needed |
|---|---|
sidePanel | The game runs in Chrome’s side panel. |
storage | Saves your game locally on this device. |
alarms | Wakes the background worker about once a minute so offline progress is counted while the panel is closed. |
notifications | Optional alert when your offline earnings reach their cap. You can turn it off in Settings. |
The extension also registers one keyboard command (default Alt+Shift+O, changeable at chrome://extensions/shortcuts) that opens the game in a new tab. This command needs no permission and sends nothing.
When data leaves your device
Only when you choose to, and only to where you choose:
- Copy save to clipboard puts your save text on your clipboard.
- Receipts: Share, Copy, Save as PNG, Save as .txt create a receipt from your game. Share opens your operating system’s share sheet (or copies to the clipboard if sharing is unavailable). You decide the recipient. Receipts contain game statistics and a credit line, nothing about you.
- Links to the developer’s site, Ko-fi and this policy open in a new tab when you click them. Those sites have their own policies.
Children
The extension collects no personal information from anyone, including children.
Changes
If the extension’s data practices ever change, this page will be updated first and the date above will change.
Contact and credits
Cobalt Star Idle is made by DHSeaDev (dhseadev.online). Questions: Dhseadev@gmail.com. Support the developer on Ko-fi. Game page: dhseadev.online/projects/cobalt-star-idle.