# Responsive Design Mode Lite

> Preview websites in different device screen sizes.

Canonical page: [https://chrome-stats.com/d/responsive-design-mode](https://chrome-stats.com/d/responsive-design-mode)

## Overview

- **ID:** `responsive-design-mode`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Responsive Design Mode
- **Category:** other
- **Daily users:** 7
- **Weekly downloads:** 1
- **Version:** 1.0.0
- **Last updated:** 2026-03-13
- **First published:** 2026-03-10
- **Size:** 15 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/responsive-design-mode/)
- **Website:** [https://7mcn.media/](https://7mcn.media/)

## Description

Preview websites in different device screen sizes to test responsive layouts. Quickly switch between desktop, tablet, and mobile views, allowing developers and designers to see how pages adapt across screens and ensure a consistent, user-friendly browsing experience.

## Rankings

- #39,526 — Overall
- #31 — response
- #65 — design
- #232 — device

## Permissions and access

### Permissions

- `tabs`
- `activeTab`
- `storage`

### 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/responsive-design-mode)