# FlashPlayer - SWF to HTML

> Open SWF links of Adobe Animate (Flash) in a pure sandboxed JavaScript emulator

Canonical page: [https://chrome-stats.com/d/flashplayer-swf-to-html](https://chrome-stats.com/d/flashplayer-swf-to-html)

## Overview

- **ID:** `flashplayer-swf-to-html`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Chandler Stimson
- **Category:** web-development,privacy-security
- **Daily users:** 3,967
- **Weekly downloads:** 91
- **Rating:** 3.89 / 5 (18 ratings)
- **Version:** 0.3.2
- **Last updated:** 2025-08-17
- **First published:** 2021-05-17
- **Size:** 9.30 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/flashplayer-swf-to-html/)
- **Website:** [https://webextension.org/listing/flashplayer.html](https://webextension.org/listing/flashplayer.html)

## Description

FlashPlayer - SWF to HTML is a Chrome extension that enables users to open and play Adobe Animate (Flash) SWF files directly within the browser using a pure JavaScript emulator. It does not require deprecated native Flash plugins, ensuring compatibility and security by running Flash content in a private sandboxed window. The extension leverages two open-source emulator engines, Ruffle and SWF2JS, to provide a seamless playback experience.

Users can manually activate the emulator via the toolbar to detect embedded Flash objects on a page and selectively open them in a standalone emulation window, which can be resized as needed. It also adds a context menu option to emulate SWF links directly. Ideal for viewing legacy Flash content securely and reliably in modern browsers without external plugins.

## Rankings

- #1,387 — Overall
- #151 — Web Development
- #281 — Privacy & Security
- #4 — flash player
- #6 — html
- #14 — adobe flash

## Permissions and access

### Permissions

- `storage`
- `activeTab`
- `scripting`
- `contextMenus`
- `notifications`

### Host permissions

- `*://*/*`

### 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).

## Review summary

Users appreciate the add-on's capability to play many SWF Flash files and games within Firefox, praising its general functionality and inclusion of a JavaScript conversion engine. However, multiple users note that it lacks automatic playback for embedded SWF objects, needing manual activation. Its compatibility is limited, failing on some platforms such as Kongregate and some pet game sites, and the conversion engine does not support ActionScript 3. Overall, while useful, the add-on has shortcomings in automatic playback and full Flash content compatibility.

### Pros

- Allows playing SWF/Flash content within Firefox.
- Generally works well with many SWF files and Flash games.
- Includes a feature to convert SWF to JavaScript (SWD2JS engine).
- Enjoyed for enabling playback of Flash games and animations despite Flash's discontinuation.

### Cons

- Does not automatically play embedded SWF files; requires manual activation.
- Incomplete support: does not work for all Flash games, especially those on certain sites like Kongregate and pet sites.
- The SWD2JS engine is a clone of the Ruffle engine and lacks ActionScript 3 support.
- Some SWF files (like those on specific websites) fail to load or display properly.

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- [Flash-HTML5 Player for YouTube™](https://chrome-stats.com/d/youtube-flash-html5) — 4,762 users, 3.96 / 5
- [Ruffle - Flash Emulator](https://chrome-stats.com/d/ruffle_rs) — 81,829 users, 4.60 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/flashplayer-swf-to-html)