PuzzleBlocker Firefox

PuzzleBlocker

PuzzleBlocker is a browser extension that helps you spend less time procrastinating and more time being focused through long-term behaviour changes. Solve Tangram puzzles to unlock time-wasting websites and make your brain work for you, not against.

Features & Capabilities

PuzzleBlocker is a browser extension that helps you spend less time procrastinating and more time being focused. To unlock time-wasting websites – like Facebook, Instagram or Reddit – you have to solve Tangram puzzles.

Solving puzzles takes time and will make your brain think procrastination is actually hard work. At best, you will close the tab and keep working. At worst, you have "earned" the reward of procrastinating for a couple of minutes.

Read more on how it works at puzzleblocker.com


If you have any issues, feel free to submit bugs or feedback through the provided tools of communication. Any feedback on the app or ideas how to improve it are greatly appreciated!


This extension currently also works in Chrome.

User Growth & Download Statistics

Manifest V2 Add-on
By:
Nikola Kretschmer
Daily users:
2
Rating:
5.00
(2)
Version:
1.1.5 Last updated: 2021-08-19
Version code:
5283066
Creation date:
2021-06-11
Risk:
Low risk impact Moderate risk likelihood
Permissions:
Size:
143.04KB
Email:
*****@nkretschmer.com
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-18
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:
Nikola Kretschmer
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/puzzleblocker/
Email:
*****@nkretschmer.com
Website:
http://www.puzzleblocker.com

User Reviews

This is great. There are some sites I spend too much time on, and this makes me pause a bit before I go to them. Because it's a puzzle, I don't try to work around it. And because it's not a hard puzzle, it gives me time to think about whether I really want to use the site or if it's just habit/procrastination.
by Fi*****, 2023-03-20
View all user reviews ›

Is PuzzleBlocker 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.

PuzzleBlocker requires very minimum permissions.

Risk impact analysis details
  • High Allows retrieval of a user’s browsing history, presenting a notable privacy risk.
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.

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

Risk likelihood analysis details
  • High This extension support email may not be valid
  • High **** ********* ******* *** *** ** *******
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
Extension Guard
Extension Guard

Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard

Secure Your Browser
Upgrade to see full risk analysis details

Best PuzzleBlocker Alternatives

Here are some Firefox add-ons that are similar to PuzzleBlocker: