SENTINEL ID

The better MFA solution — a Firefox browser extension that replaces Duo Security's authentication interface with a customizable, student-chosen login experience.

Live site: getsentinelid.today
Firefox Add-on: Add-ons Marketplace listing
Course: MGIS 360 — Building A Web Business

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What Is This

Sentinel ID is a two-part product:

1. Firefox Extension — Detects Duo Security authentication pages and overlays a Sentinel ID interface, letting students authenticate via one-tap approval, PIN, passphrase, touch pattern, or biometric confirmation. No phone required.

2. Marketing Website — A static single-page application at getsentinelid.today with product information, two pricing tiers (AaaS and SaaS), Stripe-powered checkout, and an investor interest form.

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Repository Structure

Sentinel-ID/
├── sentinel-ext/               # Firefox browser extension
│   ├── manifest.json           # Extension manifest (MV2)
│   ├── content/
│   │   ├── content.js          # Content script — injected on Duo pages
│   │   └── sentinel.css        # Overlay styles
│   ├── popup/
│   │   ├── popup.html          # Toolbar popup UI
│   │   ├── popup.js            # Popup logic — style selection, toggles
│   │   └── popup.css           # Popup styles
│   └── icons/
│       ├── icon48.png
│       └── icon96.png
├── website/                    # Marketing site
│   ├── index.html              # Single-page application
│   ├── style.css               # All site styles
│   ├── site.js                 # Page navigation logic
│   └── invest.js               # Stripe + MailerLite integrations
├── docs/                       # Course milestone documentation
└── README.md

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Extension — How It Works

The extension injects a content script on any page matching *.duosecurity.com or *.rit.edu. When a Duo authentication frame is detected, it overlays the Sentinel ID UI on top of the existing page.

Authentication modes:

Mode	Description
minimal	Single tap-to-approve button
pin	6-digit PIN entry with numpad
passphrase	Free-text secret phrase input
pattern	3x3 grid node-tap sequence
biometric	Simulated biometric scan with animation

The user's preferred mode is saved via browser.storage.local and persists across sessions. The toolbar popup allows style switching, preview on any page, and a demo mode toggle.

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Extension — Local Development

Prerequisites

• Firefox (any recent version)
• No build step required — vanilla JS

Loading in Firefox

1. Open Firefox and navigate to about:debugging
2. Click This Firefox in the left sidebar
3. Click Load Temporary Add-on
4. Navigate to sentinel-ext/ and select manifest.json

The extension will load and remain active until Firefox is closed. Reload it after any code changes.

Testing on Duo Pages

The extension auto-injects on *.duosecurity.com and *.rit.edu pages. To test without a real Duo page, enable Demo Mode in the toolbar popup — this triggers the overlay on any active tab.

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Website — How It Works

The site is a static SPA (single HTML file) with vanilla JS page navigation. There is no backend — all dynamic functionality is handled client-side:

• Stripe.js — Checkout sessions for AaaS ($499/mo) and SaaS ($4,999 one-time) plans
• MailerLite — Interest registration form for investor/partner outreach
• Google Tag Manager — Analytics

Running Locally

No build step or server required for basic viewing:

# Option 1 — open directly
open website/index.html

# Option 2 — local server (avoids some browser security restrictions)
cd website
python3 -m http.server 8000
# then visit http://localhost:8000

Note: Stripe checkout requires a live or test-mode publishable key. The current key in invest.js is a test key — no real charges will occur.

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Website — Deployment

The site is hosted on a Linux server running Apache with Cloudflare for DNS and SSL.

Deploy process:

git add .
git commit -m "your message"
git push origin main

Apache serves directly from the main branch. Cloudflare handles SSL termination and CDN caching. Changes are live within ~60 seconds of push.

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Extension — Publishing to Firefox AMO

The extension is published at: [LINK TO AMO LISTING]

To submit an update:

1. Increment the version field in manifest.json
2. Zip the contents of sentinel-ext/:

   cd sentinel-ext
   zip -r ../sentinel-id-v[VERSION].zip .

3. Upload the zip at addons.mozilla.org/developers
4. Mozilla's review process typically takes 1–7 days

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Tech Stack

Layer	Tool	Notes
Extension	Vanilla JS, CSS, Firefox WebExtensions API	No build step, MV2 manifest
Website	Vanilla HTML/CSS/JS	Static SPA, no framework
Hosting	GitHub Pages + Cloudflare	Free tier, SSL via Cloudflare
Payments	Stripe	Test mode active
Email capture	MailerLite	Embedded form API
Analytics	Google Tag Manager	GTM-TQZ5HTH3
Extension distribution	Firefox AMO	Published

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Pricing

Plan	Type	Price
AaaS — Authentication as a Service	Monthly subscription	$499/mo
SaaS — Software License	One-time	$4,999

Stripe is in test mode. Use card number 4242 4242 4242 4242 with any future expiry and CVC to test checkout.

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Course Context

This repository was built as part of MGIS 360 (Building A Web Business). It represents the full development journey of Sentinel ID from initial concept through a live, payment-ready web business.

Milestone documentation is in /docs.

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Author

Leah Kvares
Cybersecurity student, RIT
getsentinelid.today