Block Site

A customizable, password-protected website blocker and redirector.

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Block Site is a powerful Chrome extension designed to help users control and customize web access. With password protection, users can block unwanted websites, redirect specific sites to new destinations, and even display custom messages on blocked pages. Advanced features include wildcard and regex matching, reverse mode to allow only certain sites, time and date-based blocking for scheduled restrictions, and auto-closing of blocked tabs.

The extension also enhances privacy by preventing blocked websites from tracking network activity, closes annoying pop-ups immediately, and supports easy toggling of blocking via the context menu. Its managed storage compatibility allows for overwriting configurations, suitable for professional or managed environments. Comprehensive support and feature suggestions are available through official web resources and GitHub.

Add-on Productivity Privacy & Security Utilities

By:

Ray

Daily users:

71,509 -308

Rating:

3.92

(499) 6 new ratings

Version:

0.5.4 Last updated: 2025-07-09

Version code:

5983910

Creation date:

2017-10-18

Risk:

Permissions:

activeTab
storage
notifications
alarms
contextMenus
declarativeNetRequestWithHostAccess
idle

Host permissions:

<all_urls>

Size:

167.89KB

URLs:

Website

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-14

Ranking

# 258 ▼ 2

Other rankings

#10 in Tabs ▼ 1

#15 in Appearance

#15 in Privacy & Security ▼ 1

#1 in block keyword 63

#1 in item keyword 43

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Other platforms

Block Site (v0.5.4)

61,307 4.40

(42)

User reviews

Block Site is generally praised for its simplicity and effectiveness in blocking websites to help users maintain focus. However, multiple users report that recent updates have caused it to stop working in private browsing mode, and some experience inconsistent blocking behavior. A significant concern is that the add-on may corrupt or alter multiple open tabs when blocking sites, leading to loss of tab data. While many find the extension helpful and easy to use, these recent technical issues and tab corruption problems have led to frustration among users.

Pros

Simple and easy to use interface
Effectively blocks sites as intended
Helpful for maintaining focus or personal goals
Lightweight and straightforward functionality
Good user experience when functioning properly

Cons

Stopped working in private browsing mode after update
Sometimes inconsistent functionality, works intermittently
Corrupts or alters tabs when blocking/unblocking sites, causing loss of tab URLs
Unintuitive user interface according to some users
Recently ceased to work entirely for some users

Recent reviews

by ro*****, 2025-07-13

The new update stopped allowing this extension to run in private mode. please fix, otherwise than this I give it 5 stars.

by ji*****, 2025-07-10

Simple and useful, but a few days ago, it stopped working in private windows. 5 star if this issue is fixed.

by Fi*****, 2025-07-09

View all user reviews ›

Extension safety

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Block Site requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Block Site is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Low **** ********* *** **** **** ****** ******* ********** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******

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