# Simple CSS Injector

> Custom CSS injector with a resizable, dark-themed editor panel and per-domain storage.

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

## Overview

- **ID:** `simple-css-injector`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Weary Galaxy
- **Category:** web-development
- **Version:** 1.0.0
- **Last updated:** 2025-11-12
- **First published:** 2025-11-09
- **Size:** 833 KB
- **Data as of:** 2026-09-04
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/simple-css-injector/)

## Description

A simple CSS injector that aims to be simple and spawns in-page.

## Rankings

- #140,658 — Overall
- #215 — inject

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate 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).

## Similar extensions and apps

- [simple code injector](https://chrome-stats.com/d/simple-code-injector)
- [Custom CSS Injector](https://chrome-stats.com/d/custom-css-injector-iue) — 1 users
- [CustomCSS Injector](https://chrome-stats.com/d/customcss-injector) — 818 users, 4.27 / 5
- [Custom CSS Injector v2](https://chrome-stats.com/d/custom-css-injector-v2)
- [CSS Injector](https://chrome-stats.com/d/csss-injector)
- [Custom CSS/JS Injector](https://chrome-stats.com/d/custom-css-js-injector) — 4 users, 5.00 / 5
- [CSS and JS Injector](https://chrome-stats.com/d/css-and-js-injector) — 5 users
- [RabbWallet Crypto&EVM Manager](https://chrome-stats.com/d/css-injectorse) — 4.56 / 5
- [Browser Injector](https://chrome-stats.com/d/browser-injector) — 15 users, 4.00 / 5
- [Per-Site CSS Injector](https://chrome-stats.com/d/per-site-css-injector) — 16 users, 5.00 / 5
- [CSS/JS Inject](https://chrome-stats.com/d/css-js-inject) — 51 users, 5.00 / 5
- [Style Injector](https://chrome-stats.com/d/style-injector) — 1 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/simple-css-injector)