Hello Thunderbird Support Staff, I have been using Firefox and Thunderbird email for quite some time. I never have a problem with Firefox but do have an issue with Thunderbird email. In the past I used both Apple and Microsoft platforms at work and used the email programs associated with these applications. When using Microsoft and Apple email platforms I always had lines for: 1) The people who are the primary recipients of the email, 2) CC: intended for people who will receive the email but who don't mind other people seeing their names and, 3) BCC - this line is for people who the sender wants to include in the email but who DO NOT want their names to be seen by other people. Thunderbird only has one line, no CC or BCC. I have wanted to include family members on some of my emails who are very interested in the subject of my emails but don't want their names and email addresses visible to others. In order for my family to receive my emails I've had to send my original email, then go back to my Sent folder and send it to them. It strongly recommend Thunderbird issue a new version of your emails that includes CC and BCC options. It would make life MUCH easier. Thank you, Gloria Hovde [email protected]