Is LeechBlock NG safe?

Low risk

LeechBlock NG trusts lb-custom pages to complete block-page delay or password flows for chosen sites.

LeechBlock NG injects a block-page script into any page whose URL contains lb-custom. That script can pass a target URL and block-set number back to the background page, which then marks the tab as allowed and may navigate to the target after a delay or password flow.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

James Andersonv1.7.3Firefox Add-ons
18Risk
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 1.7.3. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on every site you visit

    <all_urls>

  • Schedule its own background tasks

    alarms

  • 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

menus
Updated 30 September 2026amo-866226