Trelson Browser Lockdown icon

Trelson Browser Lockdown

by Trelson AB · trelson.com · Workflow & Planning
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Trelson Browser Lockdown is a special feature only available for Chromebooks to lock down Chrome OS without using a Kiosk App.

Users
300K
0 in 30 days
Rating
2.3 / 5
unchanged in 30 days
Ratings
12
0 in 30 days
Store rank
#1,047
#956 among extensions
Version
0.9.41
updated 30 Sep 2026

Users

monthly, 2 years
0200K400KMar 2025Jan 2026Oct 2026
Latest, 15 Oct 2026: 300,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years
41423Mar 2025Jan 2026Oct 2026
Latest, 15 Oct 2026: 12 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Trelson Browser Lockdown

Schools, Colleges and Universities across the world rely on Trelson to deliver online testing and transform the exam process into a digital process. Every year over 150.000 students take their tests online using Trelson and the numbers are growing rapidly. Trelson will lock down any student device to prevent cheating and only allow selected resources. The student will be blocked from searching for information and communicating with others. The integration with Google for Education makes it easy for educational institutions to switch to online testing. By using Trelson, you will quickly be able to digitally assess your students. Teachers and students will be able to manage Trelson with little or no training. At Trelson we have a strong focus on accessibility in order to give all students an equal opportunity. Assistive technology includes extended time, spell-check, text-to-speech, speech-to-text and dyslexia fonts etc. From infrastructure and administration to design and user experience, Trelson is built on Google. If you use Google for Education - Trelson is the ultimate choice for online exams. The teacher can easily add digital resources to the assignment. For example you can add any resource from Google Drive like a PDF, text, sound, images and video clips.You can also add videos from i.e Youtube. Trelson will automatically make sure that the student access settings are correct when you share a resource the students need during the test. Trelson is available for Chrome OS, Windows, macOS, iPad and Android.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+0.0%−7+0.33
1 year+300K–−8+0.38

Version history

20 versions recorded
0.9.4130 Sep 2026
0.9.4021 Sep 2026
0.9.3917 Sep 2026
0.9.386 Sep 2026
0.9.3714 Aug 2026
0.9.359 Aug 2026
0.9.348 Aug 2026
0.9.336 May 2026

Details

Category
Workflow & Planning
First seen
30 Mar 2025
Size
60 KB
Languages
en-US
Pricing
Free
Privacy policy
trelson.com
Extension ID
bcfphnbeddegigffmilnjfddmjcpacol

Permissions and risk

Moderate riskimpact 3, likelihood 2
Permissions
alarmsidentityidentity.emailmanagementwebRequestenterprise.deviceAttributestabstabGroupsscriptingstoragedeclarativeNetRequestWithHostAccesspowersystem.cpu
Site access
<all_urls>
Can read and change data on every website you visit.

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