# Simple Custom CSS

> Add your CSS to any page.

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

## Overview

- **ID:** `simple-custom-css`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Nick G.
- **Category:** web-development,appearance
- **Daily users:** 6
- **Weekly downloads:** 1
- **Version:** 1.0.6
- **Last updated:** 2025-06-01
- **First published:** 2025-05-22
- **Size:** 30 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/simple-custom-css/)
- **Website:** [https://github.com/Psychosynthesis/CustomCSS](https://github.com/Psychosynthesis/CustomCSS)

## Description

A super easy way to add your CSS to any page. Just pin the extension to your panel, write your CSS and save. Rules apply per domain.

Why not Stylish? Because this extension is only a couple of hundred lines of code and works much faster.

## Rankings

- #42,281 — Overall
- #150 — custom feed
- #152 — custom font
- #247 — customer

## Permissions and access

### Permissions

- `storage`
- `activeTab`
- `scripting`

### Content script matches

- `<all_urls>`

## 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-custom-css)