How to Install Thunderbird Email Client and Configure PGP RSA Public Private Key Encryption

You hold your private key with Thunderbird email client. Not some email provider that will fold when men in black show up.

The following instructions for Thunderbird installation were generated installing on MS Windows.  For installation of Thunderbird on a box running Ubuntu Linux you will have a short detour when setting up your email accounts.   Notes and instructions for that can be found here:  Ubuntu Linux Thunderbird Email Client Install and Debug