Is Knockoff - Amazon Shopping Filter safe?

Clean risk

Knockoff - Amazon Brand Filter fetches remote brand lists and sends user-submitted Amazon product reports to its API.

On Amazon pages, the extension downloads brand and flagged-brand lists from api.knockoff.shopping and uses them to dim, hide, or label product listings. If you click its report option on a flagged listing, it posts product context including brand, suggested label, verdict, ASIN, marketplace hostname, extension version, title, and reason to the same service.

Ordinary Systemsv1.5.0Firefox Add-ons
0Risk
Who publishes it

Ordinary Systems - 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
Ordinary Systems

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.

api.knockoff.co
Also called by 1 other listing: knockoff-—-amazon-brand-f
shop.knockoff.co
Also called by 1 other listing: knockoff-—-amazon-brand-f

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 1.5.0. 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

Where it sends data

Destinations our analysis observed Knockoff - Amazon Shopping Filter 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.

  • api.knockoff.shopping

    Knockoff - Amazon Shopping Filter sends data to api.knockoff.shopping. No other extension we have analysed sends data here.

Updated 30 September 2026amo-3035466