Conch FF Firefox

Conch FF

By: Tedev Add-on
Richer stats and a cleaner layout for your fantasy football leagues on Sleeper. Not affiliated with Sleeper.

Features & Capabilities

Playing fantasy football on Sleeper on the desktop is a painful experience. They haven't touched it in years, and I'm just trying to sip some coffee and tinker with lineup while I pretend to work. Good news, I blew the magic conch shell and we are saved!

Conch FF upgrades the UI of your normal Sleeper league to add meaningful data about your team and league, reduce the amount of endless scrolling, and really just rethink each page while keeping it feel like a native Sleeper experience.

The data you see changes with the phase of the fantasy season you're in: Draft Season, Early Season, Late Season, Post Season and for Dynasty and Keeper leagues, Offseason Pre NFL Draft, Offseason Post NFL Draft.

All free, try it out for a bit then turn it off and see the difference. Let's love Sleeper desktop again.

All hail the magic conch!!!!

WHAT IT DOES • Adds deep and useful data about your team like trends, positional rankings, last year results, and more • Tunes the spacing, sizing, and coloring of UI • Dive into history about your leagues, sourced from the Sleeper API • Hover over data for diving deep into your opponents at a glace • Rookie draft pick capital and results • Dynamically show content based on the phase of the season

PRIVACY Conch FF has no tracking and no analytics. It reads the league page you're already viewing and fetches public data directly from Sleeper's and FantasyCalc's public APIs, from your browser. One optional feature (trade history enrichment, on by default, off in one click) sends the league ID you're viewing to the developer-operated FF TV Guide API to fetch that league's trade history — no personal data, anonymous authentication only. Full policy: https://ted-moke.github.io/ffconch-privacy/

NOTE Conch FF is an independent project and is not affiliated with, endorsed by, or sponsored by Sleeper. "Sleeper" is a trademark of its respective owner; it is used here only to describe what this extension works with.

User Growth & Download Statistics

Manifest V3 Add-on
By:
Tedev
Daily users:
69 17
Rating:
5.00
(1)
Version:
1.4.0 Last updated: 2026-08-18
Version code:
6421263
Creation date:
2026-07-21
Risk:
Moderate risk impact High risk likelihood
Permissions:
Host permissions:
  • https://sleeper.com/*
  • https://api.sleeper.app/*
  • https://api.sleeper.com/*
  • https://sleepercdn.com/*
  • https://api.fantasycalc.com/*
  • https://ff-tv-guide-507152681487.us-east4.run.app/*
Content scripts matches:
  • sleeper.com
Size:
544.08KB
URLs:
Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-08-21
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Tedev
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/conch-ff/

Is Conch FF Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Conch FF requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
  • High ******* ****** ** *** ********* ******** ************ ************ *************** **************** *******
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Conch FF is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
  • Good **** ********* *** **** **** *******
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