Table of Contents
This updated guide explains how to Block Websites with the Blocksite Add-on in Firefox through clear steps, practical examples, and important checks that help prevent common errors.

To do this you need to use the Firefox add-ons, Blocksite. this guide will guide you how to block any website on Firefox with the Blocksite utility.
Step 1: Open Firefox, select Tools -> Add-ons ( Ctrl + Shift + A ).

Or you can choose the Open Menu icon (3 dashes) and select Utilities .

Step 2: In the search box for utilities on the upper right, enter the keyword blocksite and press Enter to search.

Step 3: The list of found utilities is listed in the list below, you choose Install in the blocksite utility.

After installation is completed, a message appears to restart Firefox, select Restart now to restart Firefox.

Step 4: After the boot process is complete, select Extensions in the left menu of the Utility and select the Block site's Options .

Step 5: Customize settings for Block site.
- Check the box before Enable link remova l .

- Click Add to add the website address you may need to block access.

- In Block site you enter the path address into the Location , add a description to the Description . Then click OK .

- In addition, you can set a password for the site you just blocked, so that others cannot delete the site you just added to the site block. Check the box before Enable authentication and enter the password in the New Password box. After setup is complete you select OK to save.

From now on you cannot access the websites you have blocked on Firefox, when you click the website link you will receive a notification and no access.

Also, if you forgot the password in the site block, enter about: config in the address box on Firefox and navigate to BlockSite. authenticate , right-click the option and select Default (Reset) to remove the password.

Now you can block websites that you don't want to be accessed on your computer's Firefox. Good luck!
FAQ
What is the easiest way to Block Websites with the Blocksite Add-on in Firefox?
Start with the requirements in this guide, then follow each step in order. Check the result after every major change so problems are easier to identify.
Can beginners follow these instructions?
Yes. The process is organized into practical steps, and you can repeat any step before moving forward.
What should I check if the method does not work?
Confirm your software or device version, permissions, settings, file format, and internet connection when the task depends on online services.
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