FlashPlayer - SWF to HTML

Name: FlashPlayer - SWF to HTML
Rating: 3.8889 (18 reviews)
Author: Chandler Stimson

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.

Add-on Productivity Developer Tools Utilities

By:

Daily users:

Rating:

Version:

0.3.1 Last updated: 2025-04-20

Version code:

5933605

Creation date:

2021-05-17

Risk:

Permissions:

storage
activeTab
scripting
contextMenus
notifications

Host permissions:

*://*/*

Size:

9.44MB

URLs:

Website

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-14

Ranking

# 1,246 ▼ 10

Other rankings

#136 in Web Development ▼ 4

#249 in Privacy & Security ▼ 1

#4 in flash player keyword 49

#6 in html keyword 37

#14 in flash keyword 53

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Other platforms

FlashPlayer - SWF to HTML (v0.3.1)

50,000 3.50

(48)

FlashPlayer - SWF to HTML (v0.3.1)

46,226 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

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

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.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

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.
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Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******

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