On Linux, depending on which major browser you have, there are different solutions to get a flash player installed into your browser. Below are the solutions for some major browsers. Make sure to test your flash player ability before and after running the steps below at Adobe’s website.
Firefox
Running the following command in your terminal and accepting the download of additional dependencies will get Firefox running with a flash player.
sudo apt-get install flashplugin-installer
Chromium
Run the following commands in your terminal and wait till it is complete. Before running the second command, be sure to close Chromium if you have it open.
sudo apt-get install pepperflashplugin-nonfree
sudo update-pepperflashplugin-nonfree --install
Chrome
Chrome comes installed with a flash player. No additional work is needed.
Man and Keyboard 