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

BlockNest by gametease

Blocks sites, YouTube videos, and Telegram channels based on keywords.

0 (0 reviews)0 (0 reviews)
1 User1 User
Download Firefox and get the extension
Download file

Extension Metadata

About this extension
Popup with Settings – Site & Keyword Blocker

This extension helps you stay focused and in control by blocking websites and content based on keywords.
You can easily manage blocked, whitelisted, and permanent keywords from a password-protected settings page.

🔹 Features:

Block websites by matching keywords in their title or URL

Maintain a whitelist to allow exceptions

Add permanent keywords that cannot be removed without your password

Lock keywords (requires password confirmation 3 times) so they cannot be deleted

Import / Export your settings in JSON format for backup or sharing

Responsive popup & settings page with a sidebar for easy navigation

Supports blocking of dynamic sites such as Telegram channels (SPA navigation)

🔹 Technical Details:

Runs in the background and automatically closes tabs that match blocked rules

All data is saved securely using storage.local

Password protection ensures only you can change settings

Lightweight and privacy-friendly – no data is sent outside your browser
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:

  • Access browser tabs
  • Access browser activity during navigation
  • Access your data for all websites
Learn more
More information
Version
1.0
Size
895.67 KB
Last updated
7 months ago (Sep 8, 2025)
Related Categories
  • Other
License
MIT License
Version History
  • See all versions
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.