Is Check US Visa Slots safe?

Low risk

Check US Visa Slots stores your visa-portal username, password, and security-question answers in plaintext.

When you turn on the extension's optional 'Auto-login' feature, it writes your government visa-portal username, password, and security-question answers to the browser's local extension storage as unencrypted JSON, then reads them back to autofill the login and security-question fields on atlasauth.b2clogin.com. The data never leaves your device, but it sits in cleartext in the browser profile rather than behind any additional encryption. A separate background listener also accepts external messages from any other installed extension, though the only write path it exposes currently fails silently due to a coding bug.

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

CheckVisaSlotsv4.6.5.1Firefox Add-ons
20Risk
Who publishes it

CheckVisaSlots - 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
CheckVisaSlots

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.

app.checkvisaslots.com
Also called by 2 other listings: Check US Visa Slots, Check US Visa Slots - AIS Visa Portal
checkvisaslots.com
Also called by 2 other listings: Check US Visa Slots, Check US Visa Slots - AIS Visa Portal

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 4.6.5.1. 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

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

    activeTab

  • Run its own code inside the pages you visit

    scripting

Updated 30 September 2026amo-2921371