# EffCSS Developer Tools

> Extension to inspect EffCSS stylesheets

Canonical page: [https://chrome-stats.com/d/effcss-developer-tools?hl=fr](https://chrome-stats.com/d/effcss-developer-tools?hl=fr)

## Overview

- **ID:** `effcss-developer-tools`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** effnd
- **Category:** web-development
- **Version:** 1.0.0
- **Last updated:** 2025-10-11
- **First published:** 2025-10-08
- **Size:** 1.66 MB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/effcss-developer-tools/)
- **Website:** [https://gitverse.ru/msabitov/effcss-devtools](https://gitverse.ru/msabitov/effcss-devtools)

## Description

This extension can inspect EffCSS stylesheets, see effcss ^3.6.0 (<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/f0234504e03fc38aa34e3537adf073d4c3522192570e92589fbd4e3f56985554/https%3A//www.npmjs.com/package/effcss" rel="nofollow">https://www.npmjs.com/package/effcss</a>)

## Rankings

- #145,160 — Overall
- #105 — developer tools
- #240 — developer

## Permissions and access

### Permissions

- `tabs`
- `activeTab`
- `scripting`
- `webNavigation`
- `storage`

### Host permissions

- `<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/effcss-developer-tools?hl=fr)