# Code Verify

> An extension to verify the code running in your browser matches what was published.

Canonical page: [https://chrome-stats.com/d/code-verify](https://chrome-stats.com/d/code-verify)

## Overview

- **ID:** `code-verify`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Meta Extensions
- **Category:** privacy-security
- **Daily users:** 728
- **Weekly downloads:** 11
- **Rating:** 3.22 / 5 (27 ratings)
- **Version:** 4.1.0
- **Last updated:** 2025-09-17
- **First published:** 2022-02-18
- **Size:** 171 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/code-verify/)

## Description

**Code Verify** is an open-source browser extension designed to verify that the code running in your web browser matches the published, authentic version for apps like WhatsApp, Facebook, Instagram, and Messenger. It offers security-conscious users peace of mind by alerting them immediately if the web client has been modified or is inauthentic.

The extension works by scanning the Javascript code served to your browser and comparing it to a publicly posted "source of truth" hosted on Cloudflare. By bringing mobile app security verification protocols to the web environment, Code Verify helps prevent bad actors from serving altered versions aiming to compromise user privacy or security. Being open source, it fosters transparency and encourages broader adoption of web binary transparency for other web apps. With continuous updates and independent verification, this extension is a significant step forward for online security and privacy.

## Rankings

- #4,007 — Overall
- #8 — code
- #15 — codes
- #16 — qr code
- #22 — coding
- #38 — publish

## Permissions and access

### Permissions

- `webRequest`
- `storage`
- `https://*.privacy-auditability.cloudflare.com/*`
- `https://static.xx.fbcdn.net/`
- `https://static.cdninstagram.com/`
- `https://static.whatsapp.net/`
- `*://*.messenger.com/*`
- `*://*.facebook.com/*`
- `*://*.instagram.com/*`
- `*://*.whatsapp.com/*`

### Content script matches

- `*.messenger.com`
- `*.facebook.com`
- `*.instagram.com`
- `*.whatsapp.com`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Request access to the following domains: cloudflare.com, fbcdn.net, cdninstagram.com, whatsapp.net, messenger.com, facebook.com, instagram.com, whatsapp.com
- 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).

## Review summary

Across multiple reviews, the only recurring concern is inconsistent access to the source code: it isn't linked or the page's source code doesn't match what’s sent to other users. Other issues (UI toolbar visibility, greying on messenger.com, WhatsApp Web breakage, and Facebook performance slowdowns) are mentioned only in single reviews. A few users report functional use on some sites, while others report problems.

### Cons

- Source code is not linked or mismatched across listings (inconsistent source code)

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Source: [Chrome-Stats](https://chrome-stats.com/d/code-verify)