Last updated: June 27, 2026
FF Conch (“the extension”) is a browser extension that enhances the Sleeper fantasy football website with richer stats and a cleaner layout. FF Conch is an independent project and is not affiliated with, endorsed by, or sponsored by Sleeper.
FF Conch does not collect, store, sell, or transmit any of your personal information to the developer or to any third party. There are no analytics, no tracking, and no developer-operated servers. Everything the extension does happens locally in your own browser.
When you view a page on sleeper.com, FF Conch reads the fantasy football data
that page already deals with (your leagues, rosters, matchups, and standings) so
it can display it more usefully. To enrich that view it fetches additional
publicly available data directly from these APIs, from your browser:
api.sleeper.app, api.sleeper.com) — league,
roster, matchup, and player information.sleepercdn.com) — player avatars and images.api.fantasycalc.com) — dynasty player and draft-pick
trade values.These requests contain only the public identifiers needed to look up that data (for example, a league ID or player ID). They do not include your name, email, password, or any account credentials.
To stay fast and reduce network requests, FF Conch caches data locally in your browser using the standard extension storage APIs:
chrome.storage.local — a cached copy of the NFL player dictionary and
short-lived league/matchup data.chrome.storage.sync — your FF Conch settings (which features are turned
on). If you are signed into Chrome, your browser may sync these settings across
your own devices; this is handled entirely by Chrome, not by FF Conch.This data never leaves your browser except as the Chrome sync of your own settings described above. You can clear it at any time by removing the extension.
None. FF Conch has no backend server and sends no data to the developer or to any advertiser, analytics provider, or other third party.
storage / unlimitedStorage — to cache the player dictionary and your
settings locally, as described above.sleeper.com, the Sleeper APIs/CDN, and the FantasyCalc API
— to read the page you’re viewing and fetch the public data that powers the
enhancements. FF Conch requests access to no other sites.If this policy changes, the “Last updated” date above will change and the new version will be published at this URL.
Questions about this policy can be sent to iam@tedmoke.com.