LeechBlock NG

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.

What is LeechBlock NG?
"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.
Version: 1.6.4 (Last updated: 2024-04-03)
Creation date: 2017-10-22
Weekly download count: 1,247
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 3
  • alarms
  • downloads
  • history
  • menus
  • storage
  • tabs
  • unlimitedStorage
  • webNavigation
Host permissions:
  • <all_urls>
Size: 425.47K
URLs: Website
Stats date:

Other platforms

LeechBlock NG
LeechBlock NG (v1.6.4)
4.90 (771) 70,000
LeechBlock NG
LeechBlock NG (v1.6.4)
4.80 (89) 16,236
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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/

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User reviews
User reviews summary
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.
  • Effective at blocking distracting websites
  • Easy configuration
  • Configurable and well-organized
  • No option to disable block for moments of weakness
  • Issues with blocking certain websites
Most mentioned
  • Works well
  • Helps stay focused
  • Effective at blocking distracting websites
Recent reviews
Time block is not optional. Screen says 'Enter the time periods within which to block these sites (optional)'. But leaving it empty makes the plugin to skip everything in the list. So not optional at all.
by Peter, 2024-04-18

Excellent plugin for browser, but has become completely unusuable on mobile. Requires opening the extension and saving options again to get it to start blocking the current tab, which defeats the purpose. edit: seems this is on Firefox's end, solution is possible by not using filters (I think)
by Pepper, 2024-04-18

We wrote about how this extension makes firefox unresponsive, though it kind of is our fault for having 20 000 tabs open. The developer responded -immediately- with a fix which we really appreciate and were surprised by. They told us to go to enable a performance setting in the general tab, that only considers active tabs. However, the fix didn't work. It made firefox a little more responsive, but in that we only had to wait one minute per interaction with the browser instead of three.
by Gentle, 2024-04-17
View all user reviews
Risk impact

LeechBlock NG is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install LeechBlock NG if you trust the publisher.

Risk likelihood

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

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