Firefox version is 35.0.1. Although I can play Flash content at some sites, others return messages such as "The Camtasia Studio video content presented here requires a more recent version of the Adobe Flash Player. If you are you using a browser with JavaScript disabled please enable it now. Otherwise, please update your version of the free Flash Player by downloading here." I have disabled AdBlock Plus, Blur, and NoScript add-ons. And, I have told Firefox to accept all cookies. Still the message above comes from a particular site that is important for my daily work. I can play the content at this site with Internet Explorer 11.0.9600.17501 without problems. Thanks for help, David