Flash Debugger

Flash Debugger

Debug Flash/SWF/Flex files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Profile memory consumption and much much more...

  • Flash Debugger
  • Flash Debugger
  • Flash Debugger
  • Flash Debugger
  • Flash Debugger
What is Flash Debugger?
'Flash Debugger' is a powerful Firefox add-on that equips users with advanced capabilities to debug Flash/SWF/Flex files on the web. With this tool, users can inspect DisplayList, modify object properties in real-time, view warnings, errors and traces, and execute AS3 commands on the active SWF. Users also have the ability to inspect inside SWF files like they do HTML, identify what's slowing down SWFs, and freely transform with 3D Rotate and 3D Translate. A unique feature of Flash Debugger is its integration with Flash Player Debugger for Netscape compatible browsers. Must-have for web developers!
By: O-Minds
Users: 1,342 ▼ -9
Rating: 4.09 (22)
Version: 6.0.8 (Last updated: 2020-06-19)
Creation date: 2016-04-04
Weekly download count: 12
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
  • webRequest
  • activeTab
  • browserSettings
  • tabs
  • theme
  • storage
  • nativeMessaging
  • <all_urls>
Size: 1.13M
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Flash Debugger is the successor of FlashFirebug, it is an addon to Firefox's built-in devtools. It gives you the ability to debug any AS3 Flash on the web. Inspect the DisplayList, change properties on the fly and see the warnings, errors and traces directly in the extension. Use the inspector to hone in on elements, transform objects on the fly and use the console to run AS3 commands on the active SWF. This extension is a paid extension, you can get a 2 day trial from here:


This extension requires Flash Player Debugger for netscape compatible browsers (http://www.adobe.com/support/flashplayer/downloads.html) installed. You can find out more on the product website at:


Here are some of the extension features:

  1. Output: View errors, warning, and trace output inside the extension.
  2. Properties: View and change object properties at run-time.
  3. SWF Inspector Tool: Inspect inside SWF files like you inspect HTML.
  4. Console: Execute AS3 against active SWF.
  5. 3D Transform Tool: Free Transform, 3D Rotate, 3D Translate.
  6. Profiler: Find out what's slowing down your SWFs.
See more
User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Clean, curated universe
  • Dynamic, overlapping network
  • Suitable for developers
  • Must pay to see the bugs of the flash
Most mentioned
  • Good usability
Recent reviews
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by 翻墙部落, 2022-12-27
View all user reviews
Risk impact

Flash Debugger is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Flash Debugger if you trust the publisher.

Risk likelihood

Flash Debugger has earned a fairly good reputation and likely can be trusted.

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