DMAC LockDown Browser

by Respondus Inc · Education

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

LockDown Browser is a custom browser that locks down the exam environment within specific learning and assessment systems

Users

500K

+100K in 30 days

Rating

1.6 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#721

#658 among extensions

Version

0.4.65

updated 26 Feb 2026

Users

monthly, 2 years

Latest, 15 Oct 2026: 500,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years

Latest, 15 Oct 2026: 35 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 DMAC LockDown Browser

During an online exam, LockDown Browser will prevent you from going to other URLs, switching applications, copying questions or printing. It essentially locks you into the exam until it's submitted for grading. This is NOT a limited-feature version and there are NO advertisements of any type.

Growth

Window	Users	Change	Ratings	Rating
7 days	0	+0.0%	0	0.00
30 days	+100K	+25.0%	0	0.00
6 months	0	+0.0%	+5	−0.10
1 year	+500K	–	+13	+0.21

Version history

3 versions recorded

0.4.6526 Feb 2026

0.4.00.2814 Jul 2025

0.3.00.08628 Oct 2024

Details

Category: Education
First seen: 28 Oct 2024
Size: 4.5 MB
Languages: de, en, es, fr, it
Pricing: Free
Privacy policy: web.respondus.com
Support: respondus.com
Extension ID: ajlbefpfkpconmnpplgnafofcgbndjjn

Permissions and risk

Elevated riskimpact 4, likelihood 2

Permissions

system.displayhistorycookiesstoragewebNavigationwebRequesttabsactiveTabscriptingmanagementcontentSettingsbrowsingDatadeclarativeNetRequestWithHostAccessclipboardReadclipboardWritewallpaper

Site access

http://*/*https://*/*<all_urls>

Can read and change data on every website you visit.