Elasticfox plugin for firefox on OS X uses Terminal.app by default(to SSH into the EC2 instances). If you would like to use iTerm instead of Terminal.app:
1. Create a script (say ec2-ssh.osascript) in your home directory. This is an applescript.
on run argv tell application "iTerm" activate set cmd to "ssh -i " & item 1 of argv & " " & item 2 of argv set myterm to the last terminal tell myterm launch session "Default Session" tell the last session write text the cmd end tell end tell end tell end run
2. Edit ElasticFox properties. It should look like the following:
So, every time you try to SSH, it would use iTerm instead of Terminal.app