# Simple CSS Inserter

> Bring CSS in and out.

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

## Overview

- **ID:** `simple-css-inserter`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** JM
- **Category:** web-development,appearance
- **Daily users:** 54
- **Weekly downloads:** 1
- **Rating:** 3.00 / 5 (1 ratings)
- **Version:** 3.1
- **Last updated:** 2025-03-11
- **First published:** 2022-11-05
- **Size:** 16 KB
- **Data as of:** 2026-09-04
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/simple-css-inserter/)

## Description

**Simple CSS Inserter** is a lightweight and easy-to-use Chrome extension that allows users to quickly insert custom CSS into any webpage. By pressing the toolbar button, you can apply or remove your CSS style instantly, giving you complete control over webpage appearance.

Key features include:
- Apply CSS to the top frame only for precise control.
- Insert CSS immediately upon page load for seamless styling.
- Support for Manifest Version 3 ensuring updated extension standards.
- Compatible with Firefox 128+ as well, making it versatile across browsers.
- Only one CSS style active at a time to avoid conflicts and maintain clarity.

Whether you're a developer testing styles or a user customizing webpage looks, Simple CSS Inserter offers an effortless and efficient way to manage CSS injection directly from your browser toolbar.

## Rankings

- #15,473 — Overall
- #11 — insert
- #108 — simple

## Permissions and access

### Permissions

- `menus`
- `scripting`
- `storage`

### Host permissions

- `file:///*`
- `http://*/*`
- `https://*/*`

## 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/simple-css-inserter)