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.

LeechBlock NG - Productivity Add-On for Firefox

"LeechBlock NG" is a free Firefox add-on that aids productivity by allowing users to block distractions. This tool blocks specific websites during certain time periods, or after a user-set time limit, to help users better manage their time. It features multiple functions like immediate site lockdown, options access control, delayed access, and the ability to block a range of sites using wildcards.

Add-on stats

Daily users: 113,138
3.02K
Version: 1.6.8.2 (Last updated: 2025-02-11)
Version code: 5885508
Creation date: 2017-10-22
Weekly download count: 11,135
Firefox on Android: Yes
Manifest version: 3
Permissions:
  • alarms
  • downloads
  • history
  • menus
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
Host permissions:
  • <all_urls>
Size: 432.81K
URLs: Website

Other platforms

LeechBlock NG (v1.6.8.2)
4.89 (948) 80,000
Not available on Android
LeechBlock NG (v1.6.8.2)
4.80 (95) 18,116
Want to check extension ranking and stats more quickly for other Firefox add-ons? Install Chrome-Stats extension to view Firefox-Stats data as you browse the Firefox Browser Add-ons.

Add-on summary

LeechBlock NG (Next Generation) is a simple free productivity tool designed to block those time-wasting sites that can suck the life out of your working day. (You know: the ones that rhyme with 'Blue Cube', 'Space Hook', 'Sticky Media', 'Quitter', and the like.) All you need to do is specify which sites to block and when to block them.

You can specify up to 30 sets of sites to block, with different times and days for each set. You can block sites within fixed time periods (e.g., between 9am and 5pm), after a time limit (e.g., allow up to 10 minutes in every hour), or with a combination of time periods and time limit (e.g., allow up to 10 minutes in every hour between 9am and 5pm).

Additional features:

  • Lockdown: Block sites immediately for a specified duration.
  • Access control: Set a password or random access code for the options page, to slow you down in moments of weakness!
  • Delaying: Set a countdown to delay access to sites instead of completely blocking them.
  • Wildcards: Block a range of sites (e.g., *.somesite.com).
  • Exceptions: Whitelist sites you don't want to be blocked (e.g., +allowedsite.com).
  • Keywords: Block or allow sites based on keywords (e.g., ~badword).
Version history: https://www.proginosko.com/leechblock/version-history/

Documentation: https://www.proginosko.com/leechblock/documentation/

Usage examples: https://www.proginosko.com/leechblock/examples/

Permissions: https://www.proginosko.com/leechblock/faq/permissions/

Frequently asked questions: https://www.proginosko.com/leechblock/faq/

See more

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Extremely simple to use and effective for boosting discipline
  • Offers various features such as delay-page prompting and wildcard blocking
  • Minimalist UI that helps avoid distractions
  • Developer support and updates are reliable
  • Helps manage internet usage and preserve sanity
Cons
  • Easy to bypass by disabling or removing the extension
  • Interface may seem daunting for new users
  • Some users experienced temporary bugs or issues with the extension
Most mentioned
  • Helps with procrastination and focus
  • Delay-page option to critically evaluate time spent on distracting sites
  • Various options for blocking distractions effectively
  • UI can be complicated initially but is easy to set up once understood
  • Regular updates and support from the developer
User reviews

Very complete add-on. Actually blocks subdomains properly so i can stop myself from getting absorbed into watching shorts with youtube's intrusive recommendations but still usw the site. Great blocking options, customizable, and gotta appreciate that it's free.
by aquino40, 2025-02-11

Unintuitive interface. Either it's not possible to configure it to block a website indefinitely (as opposed to a fixed number of hours) or the UI is so unintuitive that I couldn't find that setting even after looking for several minutes.
by lkjhkjhkh, 2025-02-10
View all user reviews

Add-on safety

Risk impact

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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Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of LeechBlock NG. Use it at your own risk.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
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