Is anonymoX safe?

Low risk

anonymoX allows its VPN master server to open arbitrary URLs in new tabs on every periodic check-in.

Every ~15 minutes, anonymoX contacts master.anonymox.net to retrieve configuration. If the server's response includes a showURL field, the extension unconditionally opens that URL in a new browser tab without user interaction. The extension also fetches ad content from a server-controlled URL and injects it as an overlay into active tabs, with the ad frequency and source URL determined entirely by server response.

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

anonymoX GmbHv4.8.2Firefox Add-ons
21Risk
Who publishes it

anonymoX GmbH - no other listings under this identity, 3 shared hostnames

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

Publisher
anonymoX GmbH

Shared hosts - 3 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.

anonymox.net
Also called by 2 other listings, including anonymoX
master.anonymox.net
Also called by 2 other listings, including anonymoX
nwi.anonymox.net
Also called by 2 other listings, including anonymoX

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 4.8.2. 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>

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

  • Route all of your browsing through a server of its choosing

    proxy

  • Store data in your browser

    storage

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

    tabs

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

    activeTab

  • Show you desktop notifications

    notifications

Where it sends data

Destinations our analysis observed anonymoX 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.

  • master.anonymox.net

    anonymoX sends data to master.anonymox.net. No other extension we have analyzed sends data here.

Updated 2 November 2026amo-325576