The flash player is not coming in Ubuntu 12.04 LTS by default. So in firefox you cannot play flash in the default ubuntu installation. But you can manualy install flash player from a PPA. Now a days flash is replaced by HTML5. But still for playing video and play some games flash player is a
Install Adobe Flash Player in Ubuntu 11.10
After a fresh installation of Ubuntu 11.10 Adobe flash player is a required plugin for web browsers. In Google chrome the flash player is integrated built in but in firefox and other web browsers it requre the flash player. You need flash player to play youtube videos, view flash content in various websites etc. The
Things to do After Installing Ubuntu 11.10 for Perfect Desktop
Ubuntu 11.10 is released. You can download ubuntu 11.10 from the official website. The latest release of ubuntu comes with lot of great features and fresh user interface changes. It is evolved as much stable operating system for modern desktop and tablet environments. Ubuntu 11.10 comes with a good set of applications for every purpose.