Is JustBlock Security – Ad Blocker, Malware & Phishing Protection safe?

Clean risk

Blocks ads, popups, trackers, suspicious redirects, and unsafe sites while you browse.

This extension helps reduce intrusive ads, popups, popunders, tracking scripts, and tracking parameters in URLs. It also checks pages and links for suspicious patterns, phishing, scam, malware, and unsafe-site signals, and shows a live activity feed of protection actions. The description states that protection runs locally and that no browsing data is collected, sold, or shared.

JustBlock Securityv3.0.4Chrome Web Store
0Risk
Who publishes it

Conversion Boooster SL - 2 other listings from the same operator, none carrying a finding

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

Publisher
JustBlock Security
Declared legal entity
Conversion Boooster SL
Registered address
Paseo de la Castellana 194, Madrid, Madrid 28046, ES
Registered contact
Juan Olaizola Casín

Same operator - 2 listings

Published under a different store account, but sharing the registered address, contact or declared legal entity this one gave the store.

Shared hosts - 5 hostnames

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.

amiunique.org
Also called by 3 other listings, including CthulhuJs (Anti-Fingerprint)
gizmodo.com
Also called by 3 other listings, including Feedly
heise.de
Also called by 5 other listings, including PasswordMaker Pro
wpdev.uservoice.com
Also called by 5 other listings, including JustCall
youronlinechoices.com
Also called by 6 other listings, including Poulpeo : cashback, réductions et codes promo, Privci.io: Smart Personal Data Manager

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 3.0.4. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Store data in your browser

    storage

  • Block and redirect the requests your browser makes

    declarativeNetRequest

Updated 30 September 2026hiajdlfgbgnnjakkbnpdhmhfhklkbiol