Privacy Policy
1. Who this policy covers
This Privacy Policy applies to the HORIZON — Explore possible futures Chrome extension (the “Extension”). It explains what data the Extension handles, where it is stored, and what control you have over it.
2. Data the Extension processes
The Extension processes the following data, all of it locally on your device:
| Data | What it is | Where it lives |
|---|---|---|
| Forecast subjects & results | The questions you type and the scenarios, timelines, and evidence the Extension generates for you | Your browser’s local IndexedDB (horizon_forecast_memory_v1) |
| App settings | Display and visual-system preferences you choose in Settings | chrome.storage.local |
| Forecast reminders | Scheduled times and reminder text for forecasts you choose to revisit | chrome.storage.local + Chrome’s alarms API |
None of this data is transmitted to HORIZON’s developer, to Anthropic, Google, or any other third party. It never leaves your browser profile unless you export it yourself.
3. On-device AI
HORIZON generates forecasts using Chrome’s built-in Prompt API (Gemini Nano), which runs the language model locally on your device. Your subject, forecast parameters, and the model’s output are processed on-device and are not sent to any remote AI service.
4. Permissions the Extension requests
| Permission | Why it’s needed |
|---|---|
sidePanel | Lets HORIZON open and display its interface in Chrome’s side panel. |
storage | Saves your settings and reminder data locally in your browser. |
alarms | Schedules local reminders to revisit a forecast at a future date. |
notifications | Shows a local browser notification when a scheduled forecast reminder is due. |
HORIZON does not request host_permissions and cannot read the content of the pages you visit.
5. Analytics, tracking & advertising
The Extension contains no analytics SDKs, no crash reporters, no advertising code, and no tracking pixels. Your usage of HORIZON is not monitored or profiled by its developer.
6. Third-party links
The Extension includes an optional “Buy me a future” link to Buy Me a Coffee. This link only opens if you click it.
7. Data retention & deletion
Your forecasts, settings, and reminders stay in your browser for as long as you keep the Extension installed. You can delete them at any time by clearing individual forecasts from Forecast Memory or removing the Extension from Chrome.
8. Children’s privacy
HORIZON is not directed at children and does not knowingly collect personal information from anyone, including children under 13 — it does not collect personal information from anyone at all.
9. Changes to this policy
If this policy changes, the updated version will be posted at this same location with a new effective date above.
10. Contact
Questions about this policy can be sent to [add email].