Firefox Browser Add-ons
Log in
Preview of Block Site Extension

Block Site Extension by MarkAlexI

Easily block and redirect websites with customisable rules, helping you remain focused and productive.

4.6 (19 reviews)4.6 (19 reviews)
1,375 Users1,375 Users
You'll need Firefox to use this extension
Download Firefox
Download file

Extension Metadata

About this extension
Block Site Extension is your ultimate tool for staying focused and productive by blocking distracting websites and redirecting them to more useful destinations. Easily set up customisable rules to block specific sites or redirect them to URLs of your choice. Whether you are working, studying, or simply aiming to limit your time on certain websites, Block Site Extension is here to assist. It is straightforward to use, lightweight, and highly effective in helping you manage your online activities. Download it today and take control of your browsing experience!
Developer comments
How to Use Be Focused and Productive in Firefox on Android
  1. Open Firefox and navigate to any webpage (e.g., a search engine).
  2. Tap the three-dot menu in the bottom-right corner.
  3. Tap the ">" next to Extensions.
  4. Select Be Focused and Productive and enter your parameters.

📌 Note: If you open the menu from a blank tab or the Firefox homepage, you may only see the Extensions management page instead of direct access to the extension’s functionality.

How to Block a Resource
  1. Enter a part of the resource name in the left input field without specifying the protocol.
  2. Example: Entering "youtube" will block all subdomains of this resource.
  3. Enter the redirect URL in the right input field, fully specified with the protocol.
  4. Example: "https://google.com"
  5. Click the save button to apply the rule.

📌 Note:
- If the redirect URL is left empty, the target site will simply be blocked.
- To modify a rule, delete the old rule and add a new one.
Rated 4.6 by 19 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
16
4
1
3
0
2
1
1
1
Read all 19 reviews
Permissions and dataLearn more

Required permissions:

  • Access browser tabs

Optional permissions:

  • Access your data for all web sites
More information
Add-on Links
  • Support site
  • Support Email
Version
2.6.25
Size
279.26 kB
Last updated
6 days ago (1 Aug 2025)
Related Categories
  • Privacy & Security
  • Appearance
  • Social & Communication
Licence
MIT Licence
Version History
  • See all versions
Tags
  • content blocker
  • privacy
  • security
Add to collection
Report this add-on
More extensions by MarkAlexI
  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

  • There are no ratings yet

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 Licence v3.0 or any later version.