Whitelist-Blacklist-Blocker

Name: Whitelist-Blacklist-Blocker
Rating: 4.5625 (16 reviews)
Author: Prog.JMC

A site blocker that closes a tab if a blocked site is loaded. Sites can be whitelisted or blacklisted with regular expression rules and if a site is matched it is 'blocked'.

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This was mostly made for my own use as I couldn't find an add-on that met my needs. ie.) I want to visit reddit.com/r/cooking to look for recipes but I don't want to be distracted by reddit.com/r/all.

Blacklist : .reddit.com/r/. Whitelist: .reddit.com/r/cooking.

( ".*" is the wild card of any length and is a good catch all to wrap around your entries)

Updates to the whitelist and blacklist are done via the toolbar-icon. New entries are separated by a new line.

I'm open to suggestions and improvements if anyone else finds this tool useful.

TODO:

Improve user experience and whitelist / blacklist editing experience.
Fix a known issue where rendering is sometimes delayed and interaction with the popup is necessary for the editor to load.

Add-on

By:

Daily users:

Rating:

Version:

0.2 Last updated: 2019-06-17

Version code:

4489643

Creation date:

2019-06-16

Risk:

Permissions:

storage
tabs

Size:

11.42KB

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-15

Ranking

# 6,342 ▼ 82

Other rankings

#50 in writer's block keyword 15 ▼ 1

#56 in listen keyword 15 ▼ 1

#71 in website blocker keyword 43 ▼ 2

#177 in loading keyword 24 ▲ 1

#177 in site keyword 37

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User reviews

by 远离*****, 2025-04-02

by 敬念*****, 2025-03-03

Very minimalist and precise. Suggestion: I could give you a prompt to tell that the tab is being closed by the add on, just to make sure that is not a bug on my browser.

by VD*****, 2024-11-05

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.

Whitelist-Blacklist-Blocker requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.

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.

Whitelist-Blacklist-Blocker has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******

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