CLEAR INFORMATION. PRACTICAL CHOICES.
What’s stored on your device.
Updated 26 October 2026
Cookies, local storage and session storage all count as device storage. Optional statistics stay off until you allow them. You can change that choice at any time.
| Storage | Purpose / control | Duration |
|---|---|---|
| Supabase auth cookies (sb-…-auth-token and PKCE verifier); freestack-auth-return | Essential login and secure confirmation when you use an account. Sign out to end this browser’s session. | Provider-set session expiry, refreshed while used; return cookie up to 24 hours. |
| freestack-guest-stacks-v1 (local storage) | Your requested browser-only stacks/notes. Remove items using stack controls or clear FreeStack site storage. Export first if needed. | Until removed or browser data cleared. |
| freestack-theme; freestack-tour-v1 | Remember appearance and tour choices, without advertising use. Clear site storage to forget them. | Until cleared. |
| freestack-v3-compare / freestack-preview-compare; pending save/import (session storage) | Keep your selected comparison and requested save/import flow working in the current tab. | Until tab closure or flow completion. |
| freestack-statistics cookie | Remember yes/no to aggregate statistics. No visitor ID. Rejection or withdrawal stops optional statistics, with browser privacy signals taking priority. | 180 days, then ask again. |
Optional statistics
If allowed, we count public page views and interactions, broad device categories and the referring hostname. Counts stay for 180 days without tracking across sites. Search queries, full referrer URLs and private account paths are excluded. Security/account records needed to provide the service continue when statistics are off.
Advertising and external content
The current build uses sponsored links and an audit form, but no advertising tracking pixels. Visiting a third-party service or loading its image sends normal network information to its host. Statistics permission does not authorise advertising tracking. Future non-essential tracking would need its own prior choice.
Browser controls
Clearing or blocking essential storage may prevent login or saving and removes browser-only stacks. Do Not Track and Global Privacy Control disable optional statistics; footer choices work without configuring your browser. See the privacy policy for your data rights.