Install the Flash plugin in Linux (ubuntu) to view videos, animations and games

Adobe Flash Player is a plugin that allows browsers such as Firefox to display Flash media on web pages. Flash is often used for animations, videos and games. This article explains how to install Flash.

Installing the Flash plugin manually

1. Go to the Flash Player download page at Adobe.com.
2. When prompted, save the file (i.e. install_flash_player_"version"_linux."processor".tar.gz).
3. At the top of the Firefox window, click on the File menu and select Quit
4. Open a Terminal window (in Gnome, click on the Applications menu, select Accessories, and then select Terminal.)
5. In the Terminal window, change to the directory where you saved the file you downloaded (e.g. cd /home/user/Downloads).
6. Extract libflashplayer.so from the file you downloaded with the command tar -zxvf install_flash_player_"version"_linux."processor".tar.gz.
7. As the super user, copy the extracted file, libflashplayer.so, to your Firefox installation directory's plugins sub-directory. For example, if Firefox is installed in /usr/lib/mozilla, use the command sudo cp libflashplayer.so /usr/lib/mozilla/plugins and then enter your super user password when prompted. 

 

Source: https://support.mozilla.org/en-US/kb/install-flash-plugin-view-videos-animations-games#w_installing-flash-using-the-plugin-finder-service