As what a couple of you have probably already noticed, the official “Windows Media Player Firefox Plugin” does only work with one of your installed Firefox instances. If you have installed multiple versions in parallel or running nightly builds, it wont work. Before you are able to watch embedded wmv content, the installed library file “np-mswmp.dll” has to be copied to the plugins folder of the appropriate Firefox installation. While doing QA and having the need to download and running nightly builds of Shiretoko or Minefiled, it requires you toContinue readingGet Window Media Player plugin work with all installed Firefox versions