I am trying to to figure how to select multiple items (email addresses) using firefox on a mac. I use a web based manage my business. I am trying to send emails to multiple people. I have tried clicking on the first email and hold the command key while selecting the others. The selection just jumps. I tried holding the shift key and and it selects everything between the 1st and 2nd email address I want to use. I also tried the control key which just brings up a menu. Any help would be greatly appreciated.