I am unable to play any sort of Flash based video in Firefox. When I go to sites such as cnn.com or nba.com to view videos, I can see the movie display area for the video go black as if it is about to play, but no content ever starts. There is no audio or video. When I attempt to play the video in other browsers such as IE, Vivaldi or Chrome, the video plays seamlessly. I have tried any number of attempts to address the issue such as disabling hardware acceleration, re-installing the plugin, etc., but nothing seems to help. I have also tried, as suggested, to reset the plugins database to no avail. I will say that this issue seems somewhat recent, as in the last couple of months, but there has been nothing exceptional done with Firefox plugins or anything during this time. I had always had a problem with "jumpy" flash videos as have been reported in other threads and just accepted it, but not playing at all is entirely new. I am running Firefox 36.0.1, Flash 16.0.0.305 and Windows 8.1x64. Thanks in advance.