---
title: "CF-Predictor – Chrome extension stats, history and permissions"
description: "50,000 users, rated 4.08 by 172 people. Version 1.3.2, updated 2022-11-28. Requests 1 permission."
url: "https://extensiontracker.com/extension/ocfloejijfhhkkdmheodbaanephbnfhn"
---

# CF-Predictor

Live in the Chrome Web Store.

- Users: 50,000
- Rating: 4.08 from 172 ratings
- Last checked: 2026-09-28 02:09 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #2,504 of 264,703 live extensions
- Rank in Developer Tools: #220 of 27,615

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

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

- Extension ID: `ocfloejijfhhkkdmheodbaanephbnfhn`
- Developer: [Wsl\_F](https://extensiontracker.com/developer/ufecc394e2011e75ab08c05374977a07a)
- Category: [Productivity › Developer Tools](https://extensiontracker.com/category/productivity/developer)
- First published: 2017-02-13
- Last updated: 2022-11-28
- Version: `1.3.2`
- Size: 84.96 KiB
- Minimum Chrome: 88
- Languages (1): English
- Support page: `https://codeforces.com/blog/entry/50411?locale=en`
- Chrome Web Store: <https://chromewebstore.google.com/detail/cf-predictor/ocfloejijfhhkkdmheodbaanephbnfhn>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Focfloejijfhhkkdmheodbaanephbnfhn>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-28 | 50,000 | 4.08 | 172 |
| 2026-09-27 | 50,000 | 4.08 | 172 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

### Sites

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

### Sites where it runs scripts

- `http://codeforces.com/contest/*/standings*`: codeforces.com
- `https://codeforces.com/contest/*/standings*`: codeforces.com

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 2026-09-28 02:09 UTC; next check around 2026-10-05.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “CF-Predictor” (ocfloejijfhhkkdmheodbaanephbnfhn). Chrome Web Store data, last checked 2026-09-28. https://extensiontracker.com/extension/ocfloejijfhhkkdmheodbaanephbnfhn. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_ocfloejijfhhkkdmheodbaanephbnfhn,
  title   = {CF-Predictor (ocfloejijfhhkkdmheodbaanephbnfhn)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-28},
  url     = {https://extensiontracker.com/extension/ocfloejijfhhkkdmheodbaanephbnfhn},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/ocfloejijfhhkkdmheodbaanephbnfhn>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.