Is LibKey Nomad safe?

Low risk

LibKey Nomad assigns a persistent device UUID and transmits it alongside browser details to a.thirdiron.com on every article interaction.

Each time the extension detects an academic article, it fires analytics events — such as NomadArticleLinkPresented and NomadButtonInteraction — that include a device UUID stored in local storage, the full user-agent string, OS version, browser version, and app version. These are POSTed as JSON to https://a.thirdiron.com/events using a hardcoded authentication token. Because the UUID persists across sessions, ThirdIron can build a cross-site activity history tied to a stable device identifier.

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

Third Iron LLCv1.60.0Firefox Add-ons
17Risk
Who publishes it

Third Iron LLC - no other listings under this identity, 15 shared hostnames

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

Publisher
Third Iron LLC

Shared hosts - 15 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.

a.thirdiron.com
Also called by 1 other listing: LibKey Nomad
analytics.thirdiron.com
Also called by 1 other listing: LibKey Nomad
auth.thirdiron.com
Also called by 1 other listing: LibKey Nomad
nomad-api-cdn.thirdiron.com
Also called by 1 other listing
staging-a.thirdiron.com
Also called by 1 other listing
staging-auth.thirdiron.com
Also called by 1 other listing: LibKey Nomad
staging-nomad-api-cdn.thirdiron.com
Also called by 1 other listing
api.thirdiron.com
Also called by 2 other listings
assets.thirdiron.com
Also called by 2 other listings
nomad-api.thirdiron.com
Also called by 2 other listings
staging-analytics.thirdiron.com
Also called by 2 other listings
staging-api.thirdiron.com
Also called by 2 other listings
support.thirdiron.com
Also called by 2 other listings
browzine.com
Also called by 3 other listings
api.mendeley.com
Also called by 5 other listings, including Direct Paper Importer, Get Full Text Research (GetFTR), Mendeley Referencer

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 1.60.0. 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>

  • Store data in your browser

    storage

  • Schedule its own background tasks

    alarms

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

    webNavigation

Where it sends data

Destinations our analysis observed LibKey Nomad 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.

  • a.thirdiron.com

    LibKey Nomad sends data to a.thirdiron.com. One other extension we have analyzed sends data here.

Updated 2 November 2026amo-2654798