# Ext JS 3 DevTools

> Ext JS 3 DevTools is a Firefox DevTools extension that provides debugging capabilities for Ext JS 3.4 applications.

Canonical page: [https://chrome-stats.com/d/ext-js-3-devtools](https://chrome-stats.com/d/ext-js-3-devtools)

## Overview

- **ID:** `ext-js-3-devtools`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** 3axapp
- **Category:** web-development
- **Daily users:** 4
- **Version:** 1.7.2.0
- **Last updated:** 2026-02-27
- **First published:** 2025-02-05
- **Size:** 222 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/ext-js-3-devtools/)

## Rankings

- #48,787 — Overall

## Permissions and access

### Permissions

- `storage`
- `scripting`
- `activeTab`
- `alarms`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

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

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- 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/ext-js-3-devtools)