Extension Tracker

MasteryConnect LockDown Browser

2,000,000 users Rated 1.49 from 39 ratings Last updated 23 Sep 2026

By Respondus Inc Live in the Chrome Web Store nkkighcdodpjcdenompholalclpaobff Last checked 27 Sep 2026, 06:21 UTC

The listing

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

LockDown Browser is a custom browser that locks down the exam environment within specific learning and assessment systemsSummary from the listing
Developer
Respondus Inc
Trader status
Declared a trader under EU law
Category
Productivity › Workflow & Planning
First published
21 Feb 2023
Last updated
23 Sep 2026
Version
0.4.91
Size
4.6 MiB
Minimum Chrome
88
Languages
5 languages

Deutsch, English, español, français, italiano

Open in the Chrome Web Store ↗ Download the CRX from Google ↗
Users over time As shown on the Chrome Web Store

Tracking began on 27 Sep 2026. The chart appears after the second check.

Show the numbers
CheckedUsersRatingRatings
2026-09-272,000,0001.4939
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#128
by users, of 264,254 extensions
In its category
#45
of 44,385 in Workflow & Planning

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites
  • <all_urls>Every website
  • http://*/*Every website
  • https://*/*Every website
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • browsingDataClear your browsing data
  • clipboardReadRead what you copy
  • clipboardWriteChange what's in your clipboard
  • contentSettingsChange site settings, such as cookies, JavaScript and camera access
  • cookiesRead and change cookies on the sites it can reach
  • declarativeNetRequestWithHostAccessBlock or change network requests on the sites it can reach
  • historyRead and change your browsing history
  • managementManage your other extensions and apps
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser
  • system.displayRead your screen setup
  • tabsRead the addresses and titles of your tabs
  • wallpaper
  • webNavigationFollow your browsing, page by page
  • webRequestWatch network requests on the sites it can reach

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 27 Sep 2026, 06:21 UTC; next check around 2 Oct 2026.

We don't copy descriptions, screenshots or developers' contact details. How we collect the data

Cite this page

Extension Tracker. “MasteryConnect LockDown Browser” (nkkighcdodpjcdenompholalclpaobff). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/nkkighcdodpjcdenompholalclpaobff. Accessed 2026-09-27.
BibTeX
@misc{extensiontracker_nkkighcdodpjcdenompholalclpaobff,
  title   = {MasteryConnect LockDown Browser (nkkighcdodpjcdenompholalclpaobff)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/nkkighcdodpjcdenompholalclpaobff},
  urldate = {2026-09-27}
}

The data is free to reuse under CC BY 4.0.