I was running into a problem getting the Flash player to work using the Synaptic Package Manager. After a little while it came down I needed to install the Flash player manually. The installation was done on Fiesty Faun.
Downloading the player from Adobe was the first step. Choose the .tar.gz download, usually Option 1.
I’m command line lazy so I used the File Browser to unpack the tarball.
Open a terminal and move to the directory where the download was unpacked.
Run the installation package as root with the sudo command.
sudo ./flashplayer-installer
Enter the path for the Firefox installation folder when prompted.
/usr/lib/firefox
Repeat the process for any other browsers that need the Flash player installed.