Is Ad-BlockerPro safe?

Low risk

Ad-BlockerPro injects a pcvark promotional iframe into HTTP and HTTPS pages you visit.

Ad-BlockerPro runs a content script on all HTTP and HTTPS pages and, after a short delay, can add an iframe loaded from adblocker.pcvark.com. It also downloads security blocklists, whitelists, and download-blocking data over plaintext HTTP from ad-blocker.org hosts, which are then used for page and download blocking decisions.

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

pcvarkv1.0.42resigned1Firefox Add-ons
21Risk
Who publishes it

pcvark - no other listings under this identity, 2 shared hostnames

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

Publisher
pcvark

Shared hosts - 2 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.

hg.adblockplus.org
Also called by 4 other listings, including AdBlocker Ultimate
malwaredomains.com
Also called by 5 other listings, including StopAll Ads

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 1.0.42resigned1. 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

    http://*/*

  • Read and change your data on every secure site you visit

    https://*/*

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

    tabs

  • Add items to the right-click menu

    contextMenus

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

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

    webNavigation

  • Store data in your browser

    storage

  • Show you desktop notifications

    notifications

  • Start, monitor and manage your downloads

    downloads

  • Open files you have downloaded

    downloads.open

  • Talk to a program installed on your computer, outside the browser's sandbox

    nativeMessaging

  • Act on the current tab, but only after you click the extension

    activeTab

  • Schedule its own background tasks

    alarms

Where it sends data

Destinations our analysis observed Ad-BlockerPro contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • adblocker.pcvark.com

    Ad-BlockerPro sends data to adblocker.pcvark.com. No other extension we have analysed sends data here.

  • cdn.ad-blocker.org

    Ad-BlockerPro sends data to cdn.ad-blocker.org. No other extension we have analysed sends data here.

  • pro.ad-blocker.org

    Ad-BlockerPro sends data to pro.ad-blocker.org. No other extension we have analysed sends data here.

Updated 30 September 2026amo-855484