FlashPlayer - SWF to HTML

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

Manifest V3 Add-on Productivity Developer Tools Utilities
By:
Chandler Stimson
Daily users:
4,491 -59
Rating:
3.89
(18)
Version:
0.3.1 Last updated: 2025-04-20
Version code:
5933605
Creation date:
2021-05-17
Risk:
Moderate risk impact Moderate risk likelihood
Permissions:
  • storage
  • activeTab
  • scripting
  • contextMenus
  • notifications
Host permissions:
  • *://*/*
Size:
9.90M
URLs:
Website
Full description:
See detailed description
Source:
Firefox Browser Add-ons
Updated:
13 hours ago

Ranking

# 1,218 ▼ 3
Other rankings
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Other platforms

FlashPlayer - SWF to HTML (v0.3.1)
60,000 3.47 (47)
FlashPlayer - SWF to HTML (v0.3.1)
43,071 2.80 (13)

User reviews

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.
Recent reviews
by 远离*****, 2025-03-26
by 远离*****, 2025-02-13
by wu*****, 2024-11-04
View all user reviews ›

Extension safety

Risk impact

FlashPlayer - SWF to HTML requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
  • Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
Risk likelihood

FlashPlayer - SWF to HTML is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details

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