# Mobile simulator - responsive testing tool

> Smartphone and tablet simulator on computer with several models to test mobile responsive websites.

Canonical page: [https://chrome-stats.com/d/simulateur-mobile](https://chrome-stats.com/d/simulateur-mobile)

## Overview

- **ID:** `simulateur-mobile`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mobile FIRST
- **Category:** web-development
- **Daily users:** 11,183
- **Weekly downloads:** 627
- **Rating:** 3.74 / 5 (62 ratings)
- **Version:** 4.20.4
- **Last updated:** 2026-08-13
- **First published:** 2020-11-12
- **Size:** 7.84 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/simulateur-mobile/)
- **Website:** [https://www.webmobilefirst.com/en/](https://www.webmobilefirst.com/en/)

## Description

## Mobile Emulator Chrome Extension

The Mobile Emulator extension allows developers and designers to test their mobile websites on realistic smartphone and tablet models directly from their computer. With support for 8 popular device models including iPhone 5, iPhone 11, Samsung Galaxy S10, Xiaomi Redmi Note 6 PRO, iPhone 12, Samsung Galaxy Tab S7, iPad Air, and Macbook Air, it covers a broad spectrum of screen resolutions and orientations.

Designed to promote a mobile-first mindset, this tool provides accurate simulations to ensure your site looks and works great on multiple devices. Additionally, it features a screenshot capability, enabling users to capture transparent PNG images of devices for use in emails, presentations, or other media.

## Rankings

- #736 — Overall
- #66 — Web Development
- #1 — response
- #1 — testing
- #2 — smartphone
- #5 — mobile

## Permissions and access

### Permissions

- `webRequest`
- `scripting`
- `tabs`
- `activeTab`
- `declarativeNetRequest`
- `webNavigation`
- `storage`
- `contextMenus`

### Host permissions

- `<all_urls>`
- `*://*/*`

### Content script matches

- `<all_urls>`
- `www.webmobilefirst.com`

## Safety

- **Risk impact:** Very 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 was recently updated in the past month. New updates 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).

## Review summary

User reviews praise the add-on for reliability, speed, and the added capability of emulating phone HTTP requests for backend work, making it useful for testing before buying a device. However, multiple users report stability issues and incomplete functionality, especially around orientation (no landscape/rotation, no scrolling). There are also concerns about the premium features not working on Firefox and poor developer support. A few comparisons to Chrome and concerns about pricing have been noted, but core positives center on usable performance and extended emulation features.

### Pros

- Works reliably and quickly.
- Emulates device HTTP requests for backend processing beyond simple viewport resizing.
- Useful for testing devices before purchasing.

### Cons

- Reported unstable functionality and bugs, with some reviews noting it doesn’t work as expected.
- Cannot rotate or view in landscape orientation and cannot scroll, limiting device emulation features.
- Premium/Pro features don’t work on Firefox and there is little or no developer support.

## Similar extensions and apps

- [mobile-simulator-tool](https://chrome-stats.com/d/mobile-simulator-tool) — 18 users
- [Responsive Mobile Simulator](https://chrome-stats.com/d/responsive-mobile-simulator) — 15 users
- [Mobile phone emulator - test websites](https://chrome-stats.com/d/mobile-phone-emulator-test) — 450 users, 4.71 / 5
- [Mobile View Simulator](https://chrome-stats.com/d/mobile-view-simulator) — 21 users
- [Mobile Screen Simulator](https://chrome-stats.com/d/mobile-screen-simulator) — 129 users, 1.00 / 5
- [DeviceSimulator Plus](https://chrome-stats.com/d/devicesimulator-plus)
- [Responsive View Simulator](https://chrome-stats.com/d/responsive-view-simulator) — 236 users
- [Responsive Design Tester Pro](https://chrome-stats.com/d/responsive-design-tester-pro) — 14 users, 1.00 / 5
- [Mobile Experience Simulator](https://chrome-stats.com/d/mobile-experience-simulator) — 5 users
- [DeviceSimulate Pro](https://chrome-stats.com/d/devicesimulate-pro)
- [Lumina Device Simulator Pro](https://chrome-stats.com/d/lumina-device-simulator-pro) — 14 users
- [MobileMockup](https://chrome-stats.com/d/mobilemockup) — 3 users

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