# ActiveFlash

> Modify the navigator.platform while simulating a mobile viewport

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

## Overview

- **ID:** `activeflash`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** 李先生
- **Category:** web-development
- **Daily users:** 352
- **Weekly downloads:** 7
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0
- **Last updated:** 2020-12-31
- **First published:** 2020-12-30
- **Size:** 9.02 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/activeflash/)

## Description

ActiveFlash is a practical Chrome extension designed for developers seeking to simulate mobile environments directly on desktop browsers. It enables users to modify the `navigator.platform` property, allowing accurate emulation of various device platforms. Additionally, ActiveFlash facilitates the simulation of mobile viewports, helping developers test responsive web designs without needing physical mobile devices. This extension streamlines the development and testing workflow, ensuring websites behave as expected across different platforms and screen sizes.

## Rankings

- #6,165 — Overall
- #11 — adobe flash
- #20 — flash
- #22 — flashcards
- #92 — modify
- #136 — give

## Permissions and access

### Content script matches

- `<all_urls>`

## Safety

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

- [Active\_flash](https://chrome-stats.com/d/active_flash) — 20 users
- [falsh](https://chrome-stats.com/d/falsh) — 88 users
- [Mobile Platform Spoofer](https://chrome-stats.com/d/mobile-platform-spoofer) — 1 users
- [Mobiles Platform Spoofer](https://chrome-stats.com/d/mobiles-platform-spoofer) — 1 users
- [Native Sim](https://chrome-stats.com/d/native-sim) — 7 users, 4.00 / 5
- [Mobrem](https://chrome-stats.com/d/mobrem) — 41 users, 5.00 / 5
- [mobile-simulator-tool](https://chrome-stats.com/d/mobile-simulator-tool) — 16 users
- [windowflash](https://chrome-stats.com/d/windowflash)
- [Platform spoofer](https://chrome-stats.com/d/platform-spoofer) — 9 users
- [Mobile Browser Simulator](https://chrome-stats.com/d/mobile-browser-simulator) — 56 users
- [Mobile App Webview](https://chrome-stats.com/d/mobile-app-webview) — 10 users
- [FlashDroplet for Android](https://chrome-stats.com/d/flashdroplet-for-android) — 1 users

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