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LeechBlock NG
What it is
LeechBlock NG is a free browser extension for blocking websites according to user-defined rules and schedules. You can configure up to 30 sets of sites, with separate days and times for each. Blocking can start during scheduled periods, after a time limit, or when both conditions apply. Site rules support wildcards and exceptions; its documentation also describes blocking by keyword or referring site. A lockdown option blocks sites immediately for a duration you specify, and you can protect the options page with a password or random access code. The maker lists Firefox, Chrome, Edge, and Chromium-based browsers such as Brave, Opera, and Vivaldi. Settings and data are stored locally unless you choose sync storage, and the maker says they are removed when the extension is uninstalled. The extension requires access to browser tabs, navigation activity, and data on websites; browsing history permission is optional. The maker says LeechBlock is not designed for parental control or blocking offensive content.
For and against
For
- Free plan includes up to 30 block sets.
- Schedules can combine time periods and limits.
- Lockdown blocks sites for a chosen duration.
- Settings can remain local to the device.
Against
- Not available for macOS or iOS.
- Requires access to tabs and website data.
- A browser may briefly connect to a blocked site.
- Many open tabs can sometimes slow it down.
The verdict
LeechBlock NG offers detailed scheduling and site rules without a listed charge. Check its platform limits and permissions first, particularly if you need parental controls or use macOS or iOS.
Who it suits
LeechBlock NG may suit people who want to set their own website limits and schedules in a supported browser. It is not intended for parental controls or blocking offensive content.
Plans and prices
Free
Free browser extension · up to 30 block sets
Read 8 Oct 2026 · proginosko.com
On the record
- Access controls
- Users can protect the options page with a password or random access code.proginosko.com · read 8 Oct 2026
- Blocking schedules
- Users can block sites during scheduled time periods, after a time limit, or using both conditions together.proginosko.com · read 8 Oct 2026
- Block sets
- Users can configure up to 30 sets of sites with different times and days for each set.proginosko.com · read 8 Oct 2026
- 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.proginosko.com · read 8 Oct 2026
- 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.proginosko.com · read 8 Oct 2026
- Intended use limit
- The maker says LeechBlock is not designed for parental control or blocking offensive content.proginosko.com · read 8 Oct 2026
- Lockdown
- The lockdown feature can block sites immediately for a specified duration.proginosko.com · read 8 Oct 2026
- Matching rules
- Site lists support wildcards and exceptions, and the documentation also describes blocking by keyword or referring site.proginosko.com · read 8 Oct 2026
- 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.proginosko.com · read 8 Oct 2026
- 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.proginosko.com · read 8 Oct 2026
- Platform limits
- The FAQ says LeechBlock itself is not available for macOS or iOS and points users to ivBlock, which is based on LeechBlock.proginosko.com · read 8 Oct 2026
- 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.proginosko.com · read 8 Oct 2026
- Purpose
- LeechBlock NG is a browser extension for blocking time-wasting websites according to user-specified sites and schedules.proginosko.com · read 8 Oct 2026
- Support
- The maker directs users to its documentation, examples, FAQ, GitHub Q&A discussions, GitHub issue trackers, and developer email for support.proginosko.com · read 8 Oct 2026
- Supported browsers
- The maker lists Firefox, Chrome, Edge, and other Chromium-based browsers such as Brave, Opera, and Vivaldi.proginosko.com · read 8 Oct 2026
