Lat day I downloaded Firefox latest version and installed it on my PC. And installed flash player. But when I opened Youtube, no video was playing. Similarly, I opened Facebook and there was same error. Not any video was playing. But Firefox did not gave any error. Thats why I just UN-installed it and installed Google Chrome.
When I installed the browser, then I also installed Adobe Flash Player with it but still when I opened facebook and youtube, videos were not plating. Thats was the reason that I uninstalled the browser and installed Google Chrome.