# Web Dev Toolkit Pro

> Advanced CMS & QA developer toolkit: Multi-View environment sync, pixel-perfect smart overlay, DOM inspectors, SEO scanner, WCAG accessibility audit, and SFMC link utilities.

Canonical page: [https://chrome-stats.com/d/web-dev-toolkit-pro](https://chrome-stats.com/d/web-dev-toolkit-pro)

## Overview

- **ID:** `web-dev-toolkit-pro`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** mauspace
- **Category:** web-development,alerts-updates,tabs
- **Daily users:** 1
- **Version:** 6.6.0
- **Last updated:** 2026-08-27
- **First published:** 2026-08-24
- **Size:** 158 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/web-dev-toolkit-pro/)
- **Website:** [https://github.com/mauspace/debug-url-extension-](https://github.com/mauspace/debug-url-extension-)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/web-dev-toolkit-pro/privacy/](https://addons.mozilla.org/firefox/addon/web-dev-toolkit-pro/privacy/)

## Description

<strong>Web Dev Toolkit Pro</strong> is an advanced developer and QA toolkit designed to supercharge frontend workflows, design verification, and CMS testing.

<ul><li><strong>Multi-View Sync &amp; Diff:</strong> Open Dev, QA, and Prod environments side-by-side with synchronized scrolling and visual screenshot diffing.</li><li><strong>Smart Pixel-Perfect Overlay:</strong> Compare live web pages against design mockups with auto-detection, Blink mode, opacity, and scale controls.</li><li><strong>Intelligent DOM &amp; CMS Tools:</strong> Search 300+ property presets and target deep iframe dropdown controls.</li><li><strong>Environment Switcher &amp; Param Manager:</strong> Quickly switch between Dev/QA/Prod tiers and manage URL query parameters.</li><li><strong>SEO &amp; Metadata Scanner:</strong> Inspect Open Graph, Twitter Cards, canonical links, and indexing directives.</li><li><strong>Accessibility (WCAG) &amp; Link Audits:</strong> Heuristic contrast checks, heading hierarchy verification, and broken/cross-environment link detection with Markdown export.</li><li><strong>Salesforce Marketing Cloud (SFMC) Suite:</strong> Unwrapper for tracking links and automated test subscriber injector.</li><li><strong>Code Compare &amp; Text Utilities:</strong> Side-by-side diff tool and string casing converters.</li></ul>

## Rankings

- #121,558 — Overall
- #150 — salesforce

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `activeTab`
- `scripting`
- `declarativeNetRequest`

### Host permissions

- `*://*.rapp.com/*`
- `*://*.exacttarget.com/*`
- `*://*.salesforce.com/*`
- `*://*.marketingcloudapps.com/*`
- `*://*.sfmc-content.com/*`
- `*://*.azurewebsites.net/*`

### Content script matches

- `user-content.s4.sfmc-content.com`
- `*.rapp.com`
- `*.azurewebsites.net`

## 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 was recently updated in the past month. New updates 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/web-dev-toolkit-pro)