# Simple JavaScript Injector

> This addon creates a small popup that lets you paste some JS code and inject it into the page you are currently seeing.

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

## Overview

- **ID:** `simple-javascript-injector`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** joeperpetua
- **Category:** web-development,appearance
- **Daily users:** 182
- **Weekly downloads:** 5
- **Rating:** 3.67 / 5 (3 ratings)
- **Version:** 1.1
- **Last updated:** 2022-12-26
- **First published:** 2021-06-23
- **Size:** 70 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/simple-javascript-injector/)
- **Website:** [https://github.com/joeperpetua/simple-js-injector](https://github.com/joeperpetua/simple-js-injector)

## Description

Simple JavaScript Injector is a Chrome extension that allows users to easily inject custom JavaScript code into the web page currently open in their browser. It features a small popup interface where you can paste your JS code and execute it immediately, simplifying testing and scripting tasks.

This extension is an adaptation of a Firefox version of the original "JS injector" Chrome extension created by Daniel Han. It inherits the core functionality from the open-source project by hex0cter, ensuring a reliable and streamlined experience for developers, testers, and power users who want to manipulate web pages on the fly by running custom scripts directly in the browser.

## Rankings

- #8,722 — Overall
- #14 — javascript
- #15 — inject
- #47 — script
- #87 — simple
- #204 — scrape

## Permissions and access

### Permissions

- `activeTab`
- `storage`
- `tabs`
- `http://*/`
- `https://*/`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low 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 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/simple-javascript-injector?hl=es)