# Stack Spy

> Detect the full tech stack of any website — frameworks, analytics, CDN, payments and more.

Canonical page: [https://chrome-stats.com/d/stack-spy?hl=es](https://chrome-stats.com/d/stack-spy?hl=es)

## Overview

- **ID:** `stack-spy`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Stack-Spy
- **Category:** web-development,search-tools
- **Daily users:** 4
- **Version:** 2.2.0
- **Last updated:** 2026-04-26
- **First published:** 2026-04-23
- **Size:** 38 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/stack-spy/)
- **Website:** [https://stack-spy.com](https://stack-spy.com/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/stack-spy/privacy/](https://addons.mozilla.org/firefox/addon/stack-spy/privacy/)

## Description

Detect the full tech stack of any website — frameworks, analytics, CDN, payments and more.

Stack Spy scans any website you visit and reveals its complete technology stack in seconds.

🔍 What it detects
• Frameworks & libraries (React, Next.js, Vue, Angular…)
• Analytics & marketing (GA4, Segment, Mixpanel, HubSpot…)
• CDN & hosting (Cloudflare, Vercel, AWS CloudFront…)
• Payments (Stripe, PayPal, Braintree…)
• CMS & ecommerce (WordPress, Shopify, Webflow…)
• Security, fonts, chat widgets and 7,500+ more technologies

🚀 How it works
Open any website, click the Stack Spy icon. Detection runs locally in your browser — no page reloads, no tracking. Results are saved to a shareable public page at <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/2e1fdc135af55f8c4153407e5a3f643fa730dcc549a51e9385614a0b126ca1d7/http%3A//stack-spy.com/companies/" rel="nofollow">stack-spy.com/companies/</a>[domain].

🔗 Features
• 7,500 detection patterns
• HTTP header analysis
• Shareable /companies/ pages
• Search by technology across all indexed sites
• Social profiles detected automatically

## Rankings

- #49,632 — Overall
- #28 — ad spy
- #43 — payments
- #79 — shopify
- #186 — paypal
- #195 — analytics

## Permissions and access

### Permissions

- `activeTab`
- `tabs`
- `storage`
- `alarms`
- `webRequest`
- `http://127.0.0.1/*`
- `http://localhost/*`
- `https://*/*`

### Content script matches

- `*`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/stack-spy?hl=es)