101TECH

On Linux
mount -o loop -t iso9660 path/to/iso.iso /mnt

On FreeBSD
mdconfig -a -t vnode -f /isofile -u 0
mount -t cd9660 /dev/md0 /mnt


Type About:config in the Address bar.
right click and Add boolean value : config.trim_on_minimize
Set to true

More info here : http://kb.mozillazine.org/Memory_Leak
And originally read here : http://www.ynet.co.il/articles/0,7340,L-3563503,00.html