Another person had problemnthat on the surface sounds similar: https://support.mozilla.org/en-US/questions/1222950 However, that problem is not mine. I have several email accounts Email Acct A Email Acct B Email Acct c Email Acct d Local Folders Email Acct B has become insecure. Although I have changed the password, I have decided to physically close down that account at its source. However I want to keep the emails for reference. Email Acct d has been created to take the place of Email Acct B. What I would like to do is move Email Acct d into the position of Email Acct B and move Email Acct B into the bottom slot before Local Folders, so the Folder Panel would look like this: Email Acct A Email Acct d Email Acct c Email Acct B Local Folders The add-on mentioned in the link I provided at the top only allows sorting the folders within an Email Account. Any solution?