Chrome Browser Lockdown

Name: Chrome Browser Lockdown
Rating: 1.25 (12 reviews)
Author: Castle Learning

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

As of June 2026, Chrome Browser Lockdown has 100,000 users and a 1.25/5 rating from 12 reviews in the Accessibility category.

Castle Learning Accessibility

Chrome Web Store ↗.crx

Users0%

100.0K

100,000

Rating0%

1.25

12 reviews

Reviews0%

Version

0.0.8

Manifest V3

History

3 snapshots

Tracking since Apr 23, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 23, 2026	100.0K	1.25	12	0.0.8
May 12, 2026	100.0K	1.25	12	0.0.8
Jun 7, 2026	—	1.25	12	0.0.8
Now	100.0K	1.25	12	0.0.8

Permissions & access

Permissions: tabsnotifications
Host access: None declared

Screenshots

About

When a teacher or admin assigns an assignment or assessment in Castle Learning, they may enable an option to Enable Browser Lockdown. If they have enabled that option AND this extension is installed on the device that the student is using to complete the assignment or assessment, it will close all other tabs and will not allow the student to open a new tab or browser window.

Technical

Version: 0.0.8
Manifest: V3
Size: 15.37KiB
Min Chrome: 88
Languages: 1
Featured: No

Metadata

ID: kjafomlgjddlogahodihnhhmlobijdff
Developer ID: u92f9773a7ba1619919fb22dd198cc9b6
Developer Email: [email protected]
Created: May 18, 2022
Last Updated (Store): Aug 9, 2022
Last Scraped: Jun 7, 2026
Website: —
Support URL: —
Privacy Policy: https://cl.castlelearning.com/Review/CLO/Documents/DataPrivacySecurityPolicy.pdf