I have been playing videos with no problem using FF since the last time I had to update Adobe Flash player (which always shows up in a blank Download Manager). Anyway I tried Refreshing FF and it came up as 32 bit version (not sure if it had been 64 bit before or not) but still didn't work. Checked Silverlight and it is up to date and so is Adobe Flash Player so updated to 64 bit FF but still having trouble with some of the videos. I especially use the service provider at https://www.wwgoa.com but I can no longer play their videos. Youtube videos and these 2 content providers work: http://elitedaily.com/video/ and here http://www.sportsnet.ca/videos/but other sites do not always work. But this example at https://www.wwgoa.com/video/strength-of-glue-joints-000330/?utm_source=newsletter&utm_campaign=A6134&vsoid=A6134 Or any of the next 4 content providers do NOT: http://allthingsd.com/20070301/web-videos/ http://video.nationalgeographic.com/video/news/101-videos/mars-101-1?source=searchvideo https://www.grammy.com/videos http://fortune.com/video/ I hope someone can help soon as the one content provider charges. Thanks Barry