# usi (User|Unified Script Injector)

> use UserScripts on your Firefox for Android with usi!

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

## Overview

- **ID:** `userunified-script-injector`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** USI
- **Category:** web-development,appearance,other
- **Daily users:** 47
- **Rating:** 3.88 / 5 (25 ratings)
- **Version:** 0.5.16
- **Last updated:** 2020-11-25
- **First published:** 2015-03-25
- **Size:** 1019 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/userunified-script-injector/)
- **Website:** [https://github.com/usi-firefox/usi/](https://github.com/usi-firefox/usi/)

## Description

usi (User|Unified Script Injector) is a Firefox add-on that allows you to use user scripts on Firefox for Android. It supports experimental Greasemonkey functions, enables easy addition of user scripts through a textbox or URL, and allows the use of jQuery in user scripts.

## Rankings

- #16,518 — Overall
- #30 — inject
- #45 — jquery
- #48 — usb
- #52 — script

## Permissions and access

### Permissions

- `<all_urls>`
- `clipboardRead`
- `clipboardWrite`
- `notifications`
- `storage`
- `unlimitedStorage`
- `tabs`
- `webNavigation`

### Content script matches

- `*`
- ``

## Safety

- **Risk impact:** High 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/userunified-script-injector)