Hi Reg

This support article should help:

https://support.mozilla.org/en-US/kb/use-primary-password-protect-stored-logins

Paul,

 That article was helpful.  I wanted to follow-up, wonder if I can here or need a new thread?  
  Well I'll try.  
  --It is morning and I am going to view Internet articles first for a few minutes and then continue with opening email accounts.  At what stage would I enter my Mozilla password, before I started reading news or entertainment news, or later when I am ready to begin email accounts, messaging, etc.?  
 Thanks a lot for helping. 
Sincerely,
 Reg

The primary password would protect your email account and also the entertainment news if you had to sign into a service to view that.

Thanks Paul. To put a final touch on it, the day begins and I click on Firefox and on the top right is Sign In. I clicked there today and saw (see the attached screenshot) and go to Sign In and begin my rounds.

 Is that the right placed to sign in, or do I have it wrong?  
 Pls clarify for the amateur. 
 Reg

That is if you want to set up or sign into Firefox Sync.

The primary password will trigger when you try to sign into an account that you have saved the password for in Firefox.