Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of APIVoid Browser Lockdown

APIVoid Browser Lockdown by APIVoid

Allow-only browsing mode. Block all websites and file downloads except your trusted list.

0 (0 reviews)0 (0 reviews)
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
APIVoid Browser Lockdown: take full control of what your browser can access

Worried about employees visiting unsafe sites, kids browsing unrestricted, or devices being used outside approved websites? APIVoid Browser Lockdown puts you in charge — block every website by default and allow only the ones you trust.

Why APIVoid Browser Lockdown?

• Block everything, allow only what you trust
Enable Lockdown Mode and every website is denied by default — only your approved domains can be reached.
• Control file downloads too
Restrict downloads to specific file types only. All other file downloads are blocked automatically.
• Manage hundreds of browsers from one place
Use the Enterprise remote list feature to manage trusted domains centrally across all your devices from a single remote file.
• Blocked URL log
Every blocked domain is logged with its URL, reason, and timestamp so you always know what was stopped.
• Customizable warning page
Replace the default blocked page logo with your own company logo or name for a professional branded experience.
• Full backup and restore
Export all your settings to a JSON file and restore them on any browser in seconds.

Take control of your browser. Download APIVoid Browser Lockdown today!
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Block content on any page
  • Download files and read and modify the browser’s download history
  • Access browser activity during navigation
  • Access your data for all websites

Optional permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Homepage
  • Support site
Version
1.0
Size
43.57 KB
Last updated
5 days ago (Apr 2, 2026)
Related Categories
  • Privacy & Security
License
All Rights Reserved
Privacy Policy
Read the privacy policy for this add-on
Version History
  • See all versions
Tags
  • security
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Browsers

  • Desktop
  • Mobile
  • Enterprise

Products

  • Browsers
  • VPN
  • Relay
  • Monitor
  • Pocket
  • Bluesky (@firefox.com)
  • Instagram (Firefox)
  • YouTube (firefoxchannel)
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.