Is Buster: Captcha Solver for Humans safe?

Low risk

Buster bundles Wit.ai API credentials encrypted with a key derived entirely from its own publicly distributed source files.

The extension fetches its own source files at runtime and uses their combined SHA256 hash as the AES decryption key for a bundled secrets.txt file containing Wit.ai API keys. Because the source files are distributed with every installation, any party can compute the decryption key and recover the credentials. These keys are used as Bearer tokens when sending audio to api.wit.ai for speech recognition to solve audio CAPTCHAs.

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

Armin Sebastianv3.1.0Firefox Add-ons
21Risk
Who publishes it

Armin Sebastian - no other listings under this identity, 1 shared hostname

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

Publisher
Armin Sebastian

Shared hosts - 1 hostname

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.

iam.cloud.ibm.com
Also called by 3 other listings, including Buster

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 3.1.0. 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

  • Show you desktop notifications

    notifications

  • 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

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

    nativeMessaging

Where it sends data

Destinations our analysis observed Buster: Captcha Solver for Humans 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.wit.ai

    Buster: Captcha Solver for Humans sends data to api.wit.ai. One other extension we have analyzed sends data here.

Updated 2 November 2026amo-1013715