# Code Injector Pro

> Easily inject and run JavaScript or CSS snippets on any webpage.

Canonical page: [https://chrome-stats.com/d/code-injector-pro?hl=es](https://chrome-stats.com/d/code-injector-pro?hl=es)

## Overview

- **ID:** `code-injector-pro`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mathilda
- **Category:** web-development
- **Daily users:** 1
- **Version:** 2.1
- **Last updated:** 2025-12-13
- **First published:** 2025-12-10
- **Size:** 21 KB
- **Data as of:** 2026-09-13
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/code-injector-pro/)

## Description

Insert your own JavaScript and CSS code directly into any page. This extension saves and re-applies your changes automatically, allowing full customization of web layouts and interactions. Ideal for automating repetitive site adjustments.

## Rankings

- #122,193 — Overall
- #165 — promo code

## Permissions and access

### Permissions

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

### 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/code-injector-pro?hl=es)