LeechBlock NG

Spec sheet

Purpose

LeechBlock NG is a browser extension for blocking time-wasting websites according to user-specified sites and schedules.Read 8 Oct 2026 · proginosko.com

Privacy

The maker states that LeechBlock does not collect, store, or transmit personal information beyond user-entered settings, and does not collect or store webpage content it may access for keyword blocking.Read 8 Oct 2026 · proginosko.com

Support

The maker directs users to its documentation, examples, FAQ, GitHub Q&A discussions, GitHub issue trackers, and developer email for support.Read 8 Oct 2026 · proginosko.com

Access controls

Users can protect the options page with a password or random access code.Read 8 Oct 2026 · proginosko.com

Block sets

Users can configure up to 30 sets of sites with different times and days for each set.Read 8 Oct 2026 · proginosko.com

Blocking schedules

Users can block sites during scheduled time periods, after a time limit, or using both conditions together.Read 8 Oct 2026 · proginosko.com

Connection caveat

The maker warns that a browser may briefly connect to a blocked site, which could allow the site to log the user's IP address.Read 8 Oct 2026 · proginosko.com

Data storage

The maker says user settings and data are stored locally unless the user chooses sync storage, and are removed when the extension is uninstalled.Read 8 Oct 2026 · proginosko.com

Intended use limit

The maker says LeechBlock is not designed for parental control or blocking offensive content.Read 8 Oct 2026 · proginosko.com

Lockdown

The lockdown feature can block sites immediately for a specified duration.Read 8 Oct 2026 · proginosko.com

Matching rules

Site lists support wildcards and exceptions, and the documentation also describes blocking by keyword or referring site.Read 8 Oct 2026 · proginosko.com

Performance note

The maker says many open browser tabs can sometimes slow LeechBlock and suggests reducing open tabs or enabling processing of active tabs only.Read 8 Oct 2026 · proginosko.com

Permissions

The extension requires access to browser tabs, navigation activity, and data on all websites; browsing history permission is optional and requested only if the user enables adding blocked pages to history.Read 8 Oct 2026 · proginosko.com

Platform limits

The FAQ says LeechBlock itself is not available for macOS or iOS and points users to ivBlock, which is based on LeechBlock.Read 8 Oct 2026 · proginosko.com

Supported browsers

The maker lists Firefox, Chrome, Edge, and other Chromium-based browsers such as Brave, Opera, and Vivaldi.Read 8 Oct 2026 · proginosko.com

Plans and prices

Every LeechBlock NG plan and price →

Where Specifiction places it

• Distraction Blocking Software#21 of 297.6