With the arrival of HTML5, many were those who believed that Flash Player would disappear, without a trace in the history of the Internet. It has not been so, Flash Player is still alive, and although it gives some problems on certain browsers, depending on the operating system that we are talking about.
Latest Nightly Builds of Firefox give the possibility to activate this option. To activate it, you will have to set about: config in the address bar, in the search field must find shumway, disabled and give double click to change its value to “false”.
Its performance is significantly slower than with Adobe Flash, but keeps in mind that this is the first steps of this emulation.