LeechBlock NG Firefox

LeechBlock NG

LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.

Features & Capabilities

LeechBlock NG is a free and simple productivity Chrome extension designed to help you stay focused by blocking distracting websites during specified times. You can define up to 30 sets of sites to block, customize blocking schedules, set time limits, and even enable a lockdown mode to prevent access immediately.

Key features include password protection to avoid impulsive disabling, wildcard site blocking, keyword-based blocking or allowances, and options for delayed access. Whether you want to block social media, video streaming, or other distracting sites during work hours, LeechBlock NG offers flexible, customizable controls to enhance your productivity without hassle.

For detailed documentation, examples, and support, visit the official LeechBlock NG website.

User Growth & Download Statistics

Manifest V3 Add-on
By:
James Anderson
Daily users:
105,208 -24
Rating:
4.83
(2,023)
6 new ratings
Version:
1.7.3 Last updated: 2026-08-04
Version code:
6394147
Creation date:
2017-10-22
Risk:
High risk impact Very low risk likelihood
Permissions:
Host permissions:
  • <all_urls>
Content scripts matches:
  • <all_urls>
  • *
Size:
435.54KB
Email:
le*****@proginosko.com
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-08-20
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
James Anderson
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/leechblock-ng/
Email:
le*****@proginosko.com
Website:
https://www.proginosko.com/leechblock/support/

Permission Change History

2025-04-08: Version 1.6.8.2 → 1.6.9
Remove Permissions: downloads history
Add Optional permissions: history
2023-12-28: Version 1.6.1 → 1.6.2
Add Permissions: history
2023-10-31: Version 1.5.8 → 1.6
Add Host permissions: <all_urls>
Add Permissions: alarms
Remove Optional permissions: <all_urls>

User Reviews

Users consistently praise LeechBlock NG for its reliable blocking of distracting sites, customization options, and life-changing impact on reducing doomscrolling and online addictions. Reviewers highlight its effectiveness, balance of simplicity with power, and features that prevent bypass. The tone is largely positive and emphasizes time saved and healthier browsing habits, with only rare mentions of minor inconveniences.
Pros
  • Effectively blocks distracting websites and helps curb doomscrolling and internet addiction.
  • Highly customizable with many options to tailor blocking.
  • Works as intended and remains lightweight with minimal bloat.
  • Described as life-changing and life-saving for breaking addictive browsing habits.
  • Tab-closure feature stops blocked pages from loading, reducing temptation.
Cons
Recent reviews
Finally a good extension. Highly recommend everyone to use this instead of other alternatives, including ethical and functionality ones. This extension better supports wildcards and regular expressions. Not only that but it has a decent documentation about that and includes multiple features like lockdown, different block sets, easy "message from yourself" without custom code, timer and statistics. That was just amazing because I was able to block many domains I wished with more advanced filters. I believe the only things I missed was search engine results blocks, which would be quite hard to implement. That would be very useful because I usually find domains I would not like to visit due to leech and psychological damage by searching. The extension does what it promises, though, and I can't ask for more. ________________________________ *My* ethical point of view below (which is not about how the extensions work or their features): I don't recommend other popular alternatives like uBlocklist and Block Site because of another reason: They are HEAVILY vibe coded and this is the kind of shit that ruined Software Development for many people, me included. AI-"assisted" bullshit is horrendous and just destroyed the whole career. Not only that, but between every single LLM, the developers used Claude, by Anthropic; which is the most privacy invasive popular company I've seen thus far, Google included. That is also more concerning than other models because of how integrated it is into deepfake generation, slop coding and AI-""art"". Antropo- from greek means human and -pic is a suffix for "in such manner". That being said, the fact a company promoting a product that replaces jobs, hobbies and makes us lose our humanity is named "human-like", is just absolutely absurd.
by EC*****, 2026-08-20

It works exactly as u would expect.
by Sa*****, 2026-08-19
View all user reviews ›

Is LeechBlock NG Safe?

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.

LeechBlock NG requires some sensitive permissions that could impact your browser and data security. 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.
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  • High ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
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 Add-ons Store, 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.

LeechBlock NG has earned a good reputation and can be trusted.

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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