<pre>wesley@ubuntu:/usr/bin$ which xulrunner
/usr/bin/xulrunner
wesley@ubuntu:/usr/bin$ lslart /usr/bin/xulrunner
lslart: command not found
wesley@ubuntu:/usr/bin$ ls -lart /usr/bin/xulrunner
lrwxrwxrwx 1 root root 27 2011-05-05 17:56 /usr/bin/xulrunner -> /etc/alternatives/xulrunner
wesley@ubuntu:/usr/bin$ ls -lart /etc/alternatives/xulrunner
xulrunner xulrunner-flashplugin
xulrunner-addons-flashplugin
wesley@ubuntu:/usr/bin$ ls -lart /etc/alternatives/xulrunner
lrwxrwxrwx 1 root root 24 2011-05-05 17:56 /etc/alternatives/xulrunner -> /usr/bin/xulrunner-1.9.2