FlexBuilder: Can’t find NPSWF32.dll for Mozilla FireFox

Once in a while, while debugging a Flex application, I have been show this error by Flex Builder.

C:\Program Files\Mozilla Firefox\plugins\NPSWF32.dll

Flex Builder cannot locate the required debugger version of Flash Player. You might need to install the debugger version of Flash Player 9 or reinstall Flex Builder.

Do you want to try to debug with the current version?

This essentially means Mozilla Firefox (if you have set FireFox as the default browser for loading applications from Flex Builder) can’t find the debug version of Flash player. I still haven’t found out the exact reason why it occurs. But, I have found solutions over time which tackle it. (I have always tried each solution, one after another, as sometimes one solution works in one case while the others don’t.)

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One thought on “FlexBuilder: Can’t find NPSWF32.dll for Mozilla FireFox

  1. I have the Mac OSX version of this solution on my blog if anyone’s interested. JynxStudio

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