I get the message; "Your browser does not currently recognize any of the video formats available." when trying to play videos within Firefox. Currently using Firefox 57.0 (64-bit), and have tried to update plugins with no success. Videos were playing within Firefox before being updated to this version. How can I get videos to play again? And what do I need to do to get them to play within Firefox again? Please respond, and help me get videos to playing again. Thanks, Chad