# falsh

> Modify the navigator.platform while simulating a mobile viewport

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

## Overview

- **ID:** `falsh`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** 123
- **Category:** web-development,language-support,other
- **Daily users:** 87
- **Version:** 1.3
- **Last updated:** 2021-01-27
- **First published:** 2020-11-16
- **Size:** 9.15 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/falsh/)

## Description

Falsh is a powerful Chrome extension designed for developers and testers aiming to simulate mobile browsing conditions on desktop environments. It allows users to modify the `navigator.platform` property, effectively mimicking different device platforms while simultaneously simulating a mobile viewport. This utility is especially useful for debugging and optimizing web applications for various mobile platforms without the need for physical devices.

With Falsh, you gain precise control over how your browser identifies itself to websites, enabling realistic mobile testing scenarios directly from your desktop Chrome browser. The extension simplifies cross-platform testing and speeds up development workflows by providing an easy way to switch between different device simulations.

## Rankings

- #12,411 — Overall
- #123 — modify

## Permissions and access

### Content script matches

- `<all_urls>`

## 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 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).

## Similar extensions and apps

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- [Active\_flash](https://chrome-stats.com/d/active_flash) — 19 users
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- [Platform spoofer](https://chrome-stats.com/d/platform-spoofer) — 9 users
- [Native Sim](https://chrome-stats.com/d/native-sim) — 7 users, 4.00 / 5
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- [Responsive View Simulator](https://chrome-stats.com/d/responsive-view-simulator) — 224 users
- [Simple Swipe Navigator](https://chrome-stats.com/d/simple-swipe-navigator) — 126 users, 3.33 / 5
- [Navigation Simulator](https://chrome-stats.com/d/navigation-simulator) — 1 users

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