VisaSentinel

Name: VisaSentinel
Author: Joseph Cavallaro Jr.

By: Joseph Cavallaro Jr. Add-on

Monitors US visa OFC appointment slots and alerts you via Telegram when slots become available.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-08-21

Version:

1.5.0

Last updated: 2026-07-01

Features & Capabilities

VisaSentinel is a powerful, privacy-first automation tool designed to take the stress out of scheduling US Visa appointments. Rather than forcing you to constantly refresh the US Visa Scheduling portal, VisaSentinel runs quietly in your browser, automatically checking for available OFC appointment slots at randomized, safe intervals. If it detects open dates that match your preferences, it instantly captures a screenshot of the calendar and sends a real-time push notification directly to your phone via Telegram. Built with a sleek interface and advanced account protection features to prevent session lockouts, VisaSentinel ensures you never miss a newly opened slot while giving you total peace of mind.

User Growth & Download Statistics

Add-on

By:

Joseph Cavallaro Jr.

Daily users:

Version:

1.5.0 Last updated: 2026-07-01

Version code:

6328396

Creation date:

2026-05-20

Risk:

Permissions:

Host permissions:

https://www.usvisascheduling.com/*
https://api.telegram.org/*
https://atlasauth.b2clogin.com/*
https://visasentinel.online/*
https://payhip.com/*
https://hc-ping.com/*

Content scripts matches:

www.usvisascheduling.com

Size:

92.03KB

Email:

pe*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-08-21

Compare stats and ranking:

Ranking

# 112,533 ▲ 1,290

Other rankings

#168 in telegram keyword 26 ▼ 3

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Joseph Cavallaro Jr.

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/visasentinel/

Email:

pe*****@gmail.com

Website:

https://visasentinel.online

Permission Change History

2026-07-02: Version 1.1.0 → 1.5.0

Add Host permissions: https://visasentinel.online/* https://payhip.com/* https://hc-ping.com/*

Add Permissions: notifications

Is VisaSentinel Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

VisaSentinel requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

VisaSentinel may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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