'''This is not a Firefox problem ... You should have asked this question from the Email Website's Technical Support Team''' Sign-in to the email website you use -> Open your Contacts -> select the specific email addresses to which you send emails mostly -> there must be an Option available to Create a Group -> Name the Group and Move the selected contacts to this Group. Now when you Compose email, in the '''To:''' ''textfield'' just specify the Group Name and send the email. The email will be sent to all the email contacts you selected in the Group specified in the '''TO:''' ''textfield''. Check and tell if its working. '''NOTE: ONLY ASK FIREFOX RELATED ISSUES ON THIS FORUM'''