---
title: "Chrome Browser Lockdown – Chrome extension stats, history and permissions"
description: "100,000 users, rated 1.25 by 12 people. Version 0.0.8, updated 2022-08-09. Requests 2 permissions."
url: "https://extensiontracker.com/extension/kjafomlgjddlogahodihnhhmlobijdff"
---

# Chrome Browser Lockdown

Live in the Chrome Web Store.

- Users: 100,000
- Rating: 1.25 from 12 ratings
- Last checked: 2026-09-27 04:22 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #1,082 of 264,703 live extensions
- Rank in Accessibility: #69 of 7,982

## The listing

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

Summary from the listing:

> Blocks students from opening new tabs when they are completing a Castle assignment.

- Extension ID: `kjafomlgjddlogahodihnhhmlobijdff`
- Developer: [Castle Learning](https://extensiontracker.com/developer/u92f9773a7ba1619919fb22dd198cc9b6)
- Trader status: Declared a trader under EU law
- Category: [Make Chrome Yours › Accessibility](https://extensiontracker.com/category/make_chrome_yours/accessibility)
- First published: 2022-05-18
- Last updated: 2022-08-09
- Version: `0.0.8`
- Size: 15.37 KiB
- Minimum Chrome: 88
- Languages (1): English (United States)
- Privacy policy: `https://cl.castlelearning.com/Review/CLO/Documents/DataPrivacySecurityPolicy.pdf`
- Chrome Web Store: <https://chromewebstore.google.com/detail/chrome-browser-lockdown/kjafomlgjddlogahodihnhhmlobijdff>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fkjafomlgjddlogahodihnhhmlobijdff>

## Users over time

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

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 100,000 | 1.25 | 12 |

## 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 where it runs scripts

- `*://*.app.schoology.com/external_tool/*`: app.schoology.com and its subdomains
- `*://*.canvas.instructure.com/courses`: canvas.instructure.com and its subdomains
- `*://*.castlelearning.com/*assignmentID=*`: castlelearning.com and its subdomains
- `<all_urls>`: Every website
- `http://localhost:90/*assignmentID=*`: localhost:90

### Browser features

- `notifications`: Show notifications
- `tabs`: Read the addresses and titles of your tabs

## 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 2026-09-27 04:22 UTC; next check around 2026-09-29.

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

## Cite this page

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

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

---

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