Silverlight debugging with Firefox 3.6.4 or above

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If you've Firefox 3.6.4 or above installed on your computer and if you use it as your default browser, you'll probably meet some problems while trying to debug a Silverlight application in Visual Studio.

The Mozilla team has changed security settings for plugins.

I found the solution in the Silverlight forum (Thanks to MisterGoodcat!).

Here is what you to do :

  • Type "about:config" into Firefox address bar
  • Accept the warning (if applicable)
  • Search for the entry "dom.ipc.plugins.enabled.npctrl.dll"
  • Change its value from "true" to "false" (by double-clicking it)
  • Restart the browser