# run-a-script

> A minimalistic Firefox extension that allows you to define one JS script which is injected into every page you visit. The addon's code is only a couple of lines long so you can easily verify what's going on.

Canonical page: [https://chrome-stats.com/d/run-a-script](https://chrome-stats.com/d/run-a-script)

## Overview

- **ID:** `run-a-script`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** mivanchev
- **Category:** privacy-security
- **Daily users:** 121
- **Weekly downloads:** 4
- **Rating:** 5.00 / 5 (4 ratings)
- **Version:** 1.0.2
- **Last updated:** 2023-11-25
- **First published:** 2022-03-22
- **Size:** 62 KB
- **Data as of:** 2026-09-04
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/run-a-script/)

## Description

"run-a-script" is a minimalistic Firefox extension that enables you to inject a JS script into every web page you visit. It provides security and the ability to review the code.

## Rankings

- #10,544 — Overall
- #13 — script
- #33 — jquery
- #89 — inject
- #104 — define
- #163 — scrape

## Permissions and access

### Permissions

- `storage`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Low 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/run-a-script)