It is easy to install Adobe Flash Player in Windows but it is quite difficult to install Adobe Flash Player in Ubuntu 14.04 LTS, 16.04 . But I will show you today the EASIEST way you can do it.
Install Adobe Flash Player in Ubuntu Linux

  7 Steps to install Adobe Flash Player in Ubuntu:

  1. Go to Adobe Flash Player.
  2. Choose tar.gz for Linux and Download.
  3. Copy the Download File in Desktop and Extract the File through (Mouse) Right button → Extract Here.
  4. Rename the extracted file with adobeflash.
  5. Open Terminal by Ctrl + Alt + T
  6. Run 
    cd Desktop/adobeflash
    .
  7. Next run 
    sudo mv libflashplayer.so \/usr/lib/firefox-addons/plugins
You have installed Adobe Flash Player on Linux base OS successfully.

You can check your installed Adobe Flash Player version.

If you have any problem to install let me know.