1、Summary
Flash plugin for linux provided by Adobe stopped at version 11.2. For Chrome and CHromium, there's a Pepper Flash
Plugin. But it's not supported by Firefox. Now the browser-plugin-freshplayer-pepperflash which makes the Pepper Flash
working in Firefox. And also the flash can be used on Chrom*.
2、Command
sudo apt-get install browser-plugin-freshplayer-pepperflash