Software licenses are almost entirely about semantics. :) I think the difference would be between saying "I will give you this DVD containing a copy of firefox

Software licenses are almost entirely about semantics. :) I think the difference would be between saying "I will give you this DVD containing a copy of firefox but you must agree to my $16 installation charge" vs saying "for $16 I will on your behalf obtain firefox from the mozilla foundation and perform the service of installing on your computer".