Meta Pixel Helper (Custom)

A lightweight, customized Chrome extension that detects Meta (Facebook) Pixels on web pages and displays event details, parameters, and advanced matching data in a clean popup UI.

Background

This extension is based on Meta's official Meta Pixel Helper extension. The official version requires a Facebook login and includes a sidebar panel. This custom version removes those requirements — no login, no sidebar, just pixel detection in a simple popup.

Features

• Detects Meta Pixels on any website (including Shopify stores with sandboxed iframes)
• Shows all fired pixel events (PageView, Purchase, AddToCart, etc.)
• Displays event parameters, custom data, and advanced matching fields
• Copy Pixel ID with one click
• JSON pretty-print toggle for complex values
• Show/Hide toggle for long parameter values
• Works across all frames on a page

Installation

1. Click the green Code button at the top of this page, then click Download ZIP
2. Extract the ZIP file to a folder on your computer
3. Open Chrome and go to chrome://extensions
4. Enable Developer mode (toggle in the top-right corner)
5. Click Load unpacked
6. Select the extracted folder
7. The extension icon will appear in your Chrome toolbar

How to Use

1. Visit any website that has a Meta Pixel installed
2. Click the Meta Pixel Helper icon in your Chrome toolbar
3. The popup will display:
   • Detected Pixel IDs
   • Fired events with timestamps
   • Event parameters and custom data
   • Advanced matching data (email, phone, name, etc.)

No Login Required

This extension works entirely locally in your browser. No Facebook/Meta account or login is needed. It passively observes pixel activity on the pages you visit.

How It Works

The extension uses two detection strategies:

1. Network Interception — Monitors requests to facebook.com/tr to capture pixel fires
2. Runtime Detection — Polls the window.fbq object on pages to detect pixel initialization

Permissions

Permission	Why It's Needed
webRequest	Intercept pixel network requests
webNavigation	Clear data on page navigation
scripting	Access page context to detect fbq object
activeTab / tabs	Read current tab info for popup
storage	Store extension state
<all_urls>	Detect pixels on any website

License

MIT