# Mobrem

> A mobile browser emulator for testing the responsiveness of web pages on various mobile screen sizes and orientations.

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

## Overview

- **ID:** `mobrem`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Celsoppe
- **Category:** web-development,appearance
- **Daily users:** 41
- **Rating:** 5.00 / 5 (4 ratings)
- **Version:** 1.5.3
- **Last updated:** 2020-04-05
- **First published:** 2020-03-21
- **Size:** 109 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/mobrem/)
- **Website:** [http://www.celsoppe.com](http://www.celsoppe.com/)

## Description

Mobrem is a powerful mobile browser emulator designed for developers to test the responsiveness of web pages across multiple mobile screen sizes and orientations. It supports both portrait and landscape modes, allowing for comprehensive testing to ensure websites look great and function well on any device. This extension streamlines the development workflow by providing quick and accurate previews of how web pages render on various mobile devices, improving user experience and design efficiency.

## Rankings

- #17,617 — Overall
- #185 — response
- #216 — mobile

## Permissions and access

### Permissions

- `activeTab`
- `storage`

### Content script matches

- `*`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension website URL may be invalid

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [Mobile Mocker](https://chrome-stats.com/d/mobile-mocker)
- [Mobile Browser Simulator](https://chrome-stats.com/d/mobile-browser-simulator) — 56 users
- [Mobile phone emulator - test websites](https://chrome-stats.com/d/mobile-phone-emulator-test) — 445 users, 4.71 / 5
- [mobile-simulator-tool](https://chrome-stats.com/d/mobile-simulator-tool) — 17 users
- [MobileMockup](https://chrome-stats.com/d/mobilemockup) — 3 users
- [Responsive Mobile Simulator](https://chrome-stats.com/d/responsive-mobile-simulator) — 15 users
- [Mobile Responsiveness Checker](https://chrome-stats.com/d/mobile-responsiveness-checker) — 6 users
- [Device Emulator](https://chrome-stats.com/d/device-emulator) — 65 users
- [Mobile Viewer](https://chrome-stats.com/d/mobile-viewer) — 130 users
- [Mobile View Tester](https://chrome-stats.com/d/mobileviewtester) — 2 users
- [Mobile Platform Spoofer](https://chrome-stats.com/d/mobile-platform-spoofer) — 1 users
- [Device Emulator Pro](https://chrome-stats.com/d/device-emulator-pro)

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