# CSS Injector

> Rapidly edit custom style of webpage

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

## Overview

- **ID:** `css-injector`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Francesco De Stefano
- **Category:** web-development,appearance,other
- **Daily users:** 29
- **Weekly downloads:** 1
- **Rating:** 1.50 / 5 (2 ratings)
- **Version:** 0.5.5
- **Last updated:** 2020-09-16
- **First published:** 2020-09-15
- **Size:** 459 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/css-injector/)
- **Website:** [https://sourceforge.net/projects/css-injector/](https://sourceforge.net/projects/css-injector/)

## Description

CSS Injector is a Firefox add-on that allows web designers to rapidly edit the custom style of any webpage or website. It provides a range of features such as inspecting elements, toggling custom CSS, searching and replacing, and saving styles to the file system.

## Rankings

- #20,895 — Overall
- #20 — inject

## Permissions and access

### Permissions

- `tabs`
- `*://*/*`
- `contextMenus`
- `storage`
- `unlimitedStorage`
- `activeTab`
- `clipboardWrite`
- `clipboardRead`

### Content script matches

- `*`

## 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).

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