---
title: "CAT4Web – Chrome extension stats, history and permissions"
description: "412 users, rated 4.20 by 5 people. Version 0.4.0, updated 2026-07-14. Requests 3 permissions."
url: "https://extensiontracker.com/extension/knnchfmlohokkabfmpcjhiiegkpnfmen"
---

# CAT4Web

Live in the Chrome Web Store.

- Users: 412
- Rating: 4.20 from 5 ratings
- Last checked: 2026-09-27 04:33 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #36,900 of 264,703 live extensions
- Rank in Accessibility: #1,744 of 7,982

## The listing

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

Summary from the listing:

> CAT4Web - CAT features on the Web!

- Extension ID: `knnchfmlohokkabfmpcjhiiegkpnfmen`
- Developer: [kikimor](https://extensiontracker.com/developer/ue7c93ce7d184304c1aadc1d79f7c9be7)
- Category: [Make Chrome Yours › Accessibility](https://extensiontracker.com/category/make_chrome_yours/accessibility)
- First published: 2018-04-15
- Last updated: 2026-07-14
- Version: `0.4.0`
- Size: 68.44 KiB
- Minimum Chrome: 116
- Languages (1): русский
- Website: `http://cat4web.r8acc.ru/`
- Chrome Web Store: <https://chromewebstore.google.com/detail/cat4web/knnchfmlohokkabfmpcjhiiegkpnfmen>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fknnchfmlohokkabfmpcjhiiegkpnfmen>

## Users over time

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

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 412 | 4.20 | 5 |

## 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.

**Every website:** it can read and change your data on all the sites you visit.

### Sites

- `<all_urls>`: Every website

### Sites where it runs scripts

- `*://*/*`: Every website

### Browser features

- `declarativeNetRequestWithHostAccess`: Block or change network requests on the sites it can reach
- `offscreen`: Open a hidden page for background work

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 2026-09-27 04:33 UTC; next check around 2026-10-15.

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

## Cite this page

Extension Tracker. “CAT4Web” (knnchfmlohokkabfmpcjhiiegkpnfmen). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/knnchfmlohokkabfmpcjhiiegkpnfmen. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_knnchfmlohokkabfmpcjhiiegkpnfmen,
  title   = {CAT4Web (knnchfmlohokkabfmpcjhiiegkpnfmen)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/knnchfmlohokkabfmpcjhiiegkpnfmen},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/knnchfmlohokkabfmpcjhiiegkpnfmen>. 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`.