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Download Editors' Rating:
Editors' Rating:
Average User Rating:
out of 7 votes out of 3 votes

Quick Specs

  • Version:
  • Total Downloads:
  • Date Added:
    Jan. 29, 2011
  • Price:
  • File Size:
  • Downloads Last Week:
  • Platform:

Editors' Note: The Download Now link will prompt a local download of the Firefox extension. To install the extension directly, open the file using your Firefox browser.

Editors' Review


This free Firefox add-on is supposed to let you block certain Web sites. But what is actually does is block every single site you attempt to visit.

BlockSites plain interface is fairly straightforward, which is good since there's no Help menu. It allows you to enable warning messages for blocked sites, set up your password, and manage your lists of allowed and blocked sites. The program, though simple in design, seemed flexible at first, allowing you to add, edit and even import and export Web site links. We added sites to both the Black- and Whitelists, but the program blocked each site that we tried to visit regardless of which list it was on. Ultimately, we had to disable the program to visit any sites at all.

Don't bother with this one. It doesn't work and you'll merely waste time setting up lists.

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Publisher's Description

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User Reviews

Results 1–4 of 4

1 stars

"Useless product and does not work well"

August 08, 2015

2015-08-08 19:10:11

 |  Version: BlockSite


There are no pros I can think of.


Google really downgraded this product, and you are forced to copy and paste links or enter sites to block them whereas in the past you could just block the link by clicking the blocking option under the query. Maybe Google was losing too much money from people blocking sites which paid Google to put them first on the list when users searched.


Useless Junk.

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1 stars

"Absolutely USELESS"

May 20, 2013  |  By TechyPop

2013-05-20 13:15:48  |  By TechyPop

 |  Version: BlockSite


there are exactly None


adds entered sites (to be blocked) into BOTH the black and white lists!!! No way to either block or white list a site!!!!


Useless!!! Completely,.. Absolutely Useless!!!!!

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4 stars

"Other reviewers don't know what they're talking about"

June 10, 2011  |  By f5gj2

2011-06-10 16:47:36  |  By f5gj2

 |  Version: BlockSite


Blocks sites, prevents the links from even being clickable


You need to know what you're doing? o_O


This extension does NOT block every site, as the other reviewers state. The problem is the users mistakenly creating wildcard filters that match all sites. It's not an issue with the extension. Learn how to use it.

I'm using BlockSite in Firefox 4 and it works totally fine. Check your filters. One of them is overreaching.

Can't believe a CNET editor would publicly admit to incompetence like this.

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2 stars

"Used to work"

May 04, 2011  |  By dperrella

2011-05-04 16:14:04  |  By dperrella

 |  Version: BlockSite


It used to block the sites that I wanted it to, while allowing me to see other sites.


Now it usually blocks every single site and has to be disabled.


It used to work, but lately (since Firefox 4? Since I added to many sites to my list?) it blocks all sites, just as described in the cnet review. I've gone through a lot of gyrations of disabling and enabling it and it may have worked briefly, but mostly it just blocks everything. I'm looking for an alternative.

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Results 1–4 of 4

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Full Specifications

Publisher Erik van Kempen
Publisher web site
Release Date January 29, 2011
Date Added January 29, 2011
Category Browsers
Subcategory Firefox Add-ons & Plugins
Operating Systems
Operating Systems Windows XP/Vista
Additional Requirements Firefox 2.0 - 3.6.*
Download Information
File Size 15.81KB
File Name External File
Total Downloads 14,921
Downloads Last Week 10
License Model Free
Limitations Not available
Price Free

Previous Versions:

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