I've seen several queries about how to open multiple instances of Firefox (nee Firebird) without encountering the dreaded Profile Manager prompt. I saw this thread on Mozillazine about how to do just that: http://forums.mozillazine.org/viewtopic.php?t=51428 In a nutshell, create this script: #!/bin/sh firefox -remote 'ping()' if [ $? -eq 0 ]; then #open a new window #firefox -remote "openURL(www.google.com, new-window)" & firefox -remote "openURL(${1}, new-window)" & else #open new instance firefox $1 & fi Make it executable, drop it in /usr/bin, and always start Firefox by calling this script. I also made sure that my file manager, Gentoo, calls this script, I changed .htmlview appropriately, and I changed all my firefox desktop and menu icons to point to it as well. Works like a dream. I suspect it would work similarly for Mozilla as well but I haven't made such a Mozilla script yet to test.