CF-Predictor

Name: CF-Predictor
Rating: 4.6304 (46 reviews)
Author: Wsl_F

By: Wsl_F

This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.

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Install

Features & Capabilities

CF-Predictor is a Chrome extension designed to enhance your competitive programming experience on Codeforces. It modifies the contest standings page to display approximate rating changes for every contestant both during and after contests. This immediate insight helps alleviate the anxiety of waiting for official rating updates by showing likely deltas in real-time. Whether you're a seasoned competitor or a casual participant, CF-Predictor provides valuable foresight into your performance trends.

By integrating seamlessly with Codeforces, CF-Predictor offers a user-friendly way to track rating fluctuations, making contest results more transparent and engaging. Say goodbye to nervous waiting and stay informed about your progress instantly with this handy tool.

User Growth & Download Statistics

Add-on Developer Tools Education

By:

Wsl_F

Daily users:

1,077 4

Rating:

4.63

(46)

Version:

1.3.2 Last updated: 2022-11-26

Version code:

5491315

Creation date:

2017-02-13

Risk:

Permissions:

https://cf-predictor.wasylf.xyz/

Content scripts matches:

codeforces.com

Size:

90.68KB

Email:

Wa*****@gmail.com

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-17

Compare stats and ranking:

Ranking

# 3,112 ▲ 16

Other rankings

#66 in rating keyword 16 ▼ 1#118 in wait keyword 4 ▼ 1#185 in modify keyword 44 ▲ 1#211 in show keyword 24 ▼ 1

Other platforms

CF-Predictor (v1.3.2)

50,000 4.09

(171)

For Developers

Monetize with App Pass Boost with Extension Booster

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:

Wsl_F

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/cf-predictor/

Email:

Wa*****@gmail.com

Permission Change History

2022-11-26: Version 1.2.3 → 1.3.2

Add Permissions: https://cf-predictor.wasylf.xyz/

Remove Permissions: https://cf-predictor-frontend.herokuapp.com/

User Reviews

Users find the CF-Predictor Firefox add-on very good and highly useful. Reviewers praise its effectiveness and usefulness, with no reported issues or drawbacks noted in multiple reviews.

Pros

Easy to use and very good functionality
Highly useful plugin that meets user needs

Cons

Recent reviews

After re-installation the plus icon in dosen't appear in my firefox tools bar. And also there is no explicit setting option to add the extension in firefox tools bar. Means if you didn't add the extension to the tools bar during installation you will never be able to add the extension to you firefox browser tools bar. I don't know if this issue is happening with others too. But it has already happened with me. Specifically, after using this extension to submit solution directly from my VSCode.

by za*****, 2025-09-24

by yy*****, 2022-12-17

View all user reviews ›

Is CF-Predictor 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.

CF-Predictor requires very minimum permissions.

Risk impact analysis details

High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
Low ******* ****** ** *** ********* ******** *********** **************

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.

CF-Predictor has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
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