Is LeechBlock NG safe?

Clean risk

LeechBlock NG reads browsing details locally to enforce user-configured site blocking rules.

LeechBlock NG runs on all sites so it can compare the current page against the user's blocking schedules, URL patterns, and time limits. It uses URLs, referrers, tab activity, and, when keyword rules are enabled, page title/body text for local blocking decisions; the available evidence does not show those browsing details being sent to a fixed remote endpoint.

James Andersonv1.7.3Chrome Web Store
0Risk
Who publishes it

James Anderson - no other listings under this identity, 1 shared hostname

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
James Anderson

Shared hosts - 1 hostname

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

proginosko.com
Also called by 3 other listings, including LeechBlock NG

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 1.7.2. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to. The current listed version is 1.7.3, which we have not unpacked yet.

  • Read and change your data on every site you visit

    <all_urls>

  • Schedule its own background tasks

    alarms

  • Add items to the right-click menu

    contextMenus

  • Run hidden pages in the background

    offscreen

  • Store data in your browser

    storage

  • See the address and title of every tab you have open

    tabs

  • Store an unlimited amount of data in your browser

    unlimitedStorage

  • See every page you navigate to, as you navigate to it

    webNavigation

Updated 30 September 2026blaaajhemilngeeffpbfkdjjoefldkok