# CSS Edit

> A Firefox extension for injecting custom CSS into any website in real-time, with preset management and per-site configuration.

Canonical page: [https://chrome-stats.com/d/css-edit?hl=pt](https://chrome-stats.com/d/css-edit?hl=pt)

## Overview

- **ID:** `css-edit`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** keyser
- **Category:** other
- **Daily users:** 13
- **Weekly downloads:** 6
- **Version:** 0.5
- **Last updated:** 2026-04-02
- **First published:** 2026-03-26
- **Size:** 55 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/css-edit/)
- **Website:** [https://github.com/Keyser2356/css-editor](https://github.com/Keyser2356/css-editor)

## Description

✨ What does this extension do?

A minimal popup-based CSS injector that lets you style any website on the fly. Changes apply instantly as you type — no reloads, no Apply button.
<ol><li><strong>Write</strong> CSS directly in the built-in editor.</li><li><strong>Watch</strong> styles apply to the page in real-time as you type.</li><li><strong>Save</strong> snippets as named presets (global or per-site).</li><li><strong>Manage</strong> all your sites and their active presets from one place.</li><li><strong>Auto-applies</strong> saved CSS on every page load — no manual action needed.</li></ol>

📋 Features
<ul><li><strong>Real-time Injection:</strong> CSS applies as you type with 150ms debounce.</li><li><strong>Auto-apply on Load:</strong> Saved drafts and presets are injected automatically when you visit a site.</li><li><strong>Preset System:</strong> Save and reuse styles across sessions — global or domain-specific.</li><li><strong>Per-site Control:</strong> Enable/disable injection per domain with a single toggle.</li><li><strong>Format on Paste/Blur:</strong> CSS is auto-formatted when you paste or leave the editor.</li><li><strong>Scroll Memory:</strong> Editor remembers your scroll position per domain.</li><li><strong>Delete Presets &amp; Sites:</strong> Remove entries with the × button.</li></ul>

## Rankings

- #29,760 — Overall
- #77 — css editor
- #189 — inject
- #226 — text editor

## Permissions and access

### Permissions

- `activeTab`
- `tabs`
- `storage`
- `<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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/css-edit?hl=pt)