Privacy Policy — FilmRatio for Letterboxd

This privacy policy explains what information FilmRatio for Letterboxd accesses, why it is accessed, and how it is handled.

Summary
- FilmRatio fetches public IMDb technical pages (https://www.imdb.com/title/{imdbId}/technical/) from the user's browser to determine film aspect ratios.
- Requests go directly from the user's device to Imdb. No data is forwarded to any server owned by the extension author.
- Cached results are stored locally for 30 days by default.
- Lookups performed in private/incognito windows are not persisted to storage.
- No analytics, telemetry, or user-identifying data are collected or transmitted to third parties.

Personal Data Collection
- FilmRatio does not collect any personal data. Only publicly available IMDb IDs, and aspect ratio results are cached locally for performance. No browsing history, website content, or user-identifying information is accessed or transmitted.

Data items accessed
- IMDb title identifier.
- Aspect ratio results parsed from the fetched page.
- Minimal usage counters (total lookups, cache hits, IMDb requests) stored locally.

Why we fetch data
- To display the film aspect ratio on Letterboxd film pages and in the extension UI.

Retention and storage
- Cached aspect ratio results are stored locally (browser local storage) for 30 days.
- Incognito/private lookups are never written to persistent storage.

Third-party services
- No developer-controlled servers are used. The only external communication is browser → imdb.com.
- Third-party libraries included:
* webextension-polyfill. See LICENSE.
* Pico CSS. See LICENSE.

Updates
- This policy may be updated; the latest version is available in the repository.