Flash Switcher

This extension allows you to easily switch from one flash player plugin version to another, or also to remove or save the currently installed plugin (maybe for testing the express install).
Once installed you will find the “flash switcher” icon in the Firefox statusbar at bottom right (and also in the Tools Firefox menu). Click on it and a list of available options will appear.

The extension has been tested on the followings Operating System:

  • Window XP
  • Ubutntu linux
  • Mac OSX Tiger and Leopard

Table of contents:

  1. Updates
  2. Download and Install
  3. Know issues
  4. Users comments
  5. Useful links
  6. Videos


  • The extension has been splitted into 2 different versions: one for windows users and the other one for mac users. it will be easier to mantain due to the OS differences
  • The recent Firefox update 3.6 breaks this extension because of some changes in the permissions management.
  • If you have problems with errors like NS_ERROR_FILE_ACCESS_DENIED remember that this is a limitation of the Operating System, because usually the browser default folder is a system folder.
    What you have to do is: uninstall flash player ( you can save it before uninstalling, using flashswitcher ), restart the browser.
  • Windows users. Once installed the plugin and the browser has been restarted, be sure the following directory has been created: C:\Users\{username}\AppData\Roaming\Mozilla\Firefox\Profiles\{yourprofile}\Plugins, otherwise manually create it.
  • The Flash Player usually is located into a system folder and a firefox extension doesn’t have the permissions to write into that folder. In fact the alternate plugins are saved inside an user profile folder ( browsers look at both those folder to find plugins ).
    Because of that, if you want to completely remove a Flash Player you should use the Adobe uninstaller. ( It is better to run the uninstaller before start using this extension in order to solve possible folder conflicts – even if I didn’t run the uninstaller and flash switcher run smootly for me ).

Download and Install

This extension is available for Firefox 3.x and above.¬†I’m sorry but the installer it’s a bit large because it’s batteries included ūüôā

That’s because within the installer there are a couple of flash player versions for any of the supported OS ( linux, win and mac ) and because with flash 9 the weight of flash player increased really a lot! ( 11Mb on mac, for example )

Know issues

Here I copied some of the users comments for the know issues of Flash Switcher.

  • Plugin Switcher stopped working for me on my Win7-64bit-system. These were my steps to fix the problem:
    1. Change the Firefox plugins directory path in Flash Switcher settings from “C:\Windows\System32\Macromed\Flash” to “C:\Windows\SysWOW64\Macromed\Flash”¬†
    2. Find this folder in your explorer and follow the steps descriped on this blog: http://www.blog.lessrain.com/flash-switcher-extension-and-vista/
    * Go to C:\Windows\System32\Macromed (now C:\Windows\SysWOW64\Macromed)
    * Right-click “Flash” folder to open the properties panel.
    * Click the “Security” tab.
    * Click “Edit” Button.
    * Select the current user in “Group or user names:”
    * Change folder permissions, normally I change it to have full control.
    * Click “Apply” and “OK”
  • If you’re having trouble with: 0x80520008 (NS_ERROR_FILE_ALREADY_EXISTS) [nsILocalFile.copyTo] then try this… (it worked for me)¬†
    1. Close FF 
    2. go to C:\windows\system32\macromed\flash 
    3. rename npswf32.dll to something else (e.g. ~npswf32.dll) 
    4. retstart FF Рit should have no flash now, and prompt you for the plugin 
    5. use flash switcher to select the version you want – away you go… !
  • This addon was simple for me to use, here are my steps for getting Flash 9 Debug and Flash 10 Debug both working:¬†
    Install this addon
    Download, installed Flash 10 Debug version
    Loaded Firefox, save the Flash 10 version as “Flash 10 Debug”
    Repeat steps 2, 3 to install Flash 9 debugger the same way



Here some useful links:



Flash Switcher on Linux Ubuntu


Flash Switcher on OSX