Hey Magic Banana,
That's not the only thing that Mozilla's trademark policy says. It also says
that, as long as the Mozilla trademark stuff is included, it must be
distributed without charge.
The requirement to rename a modified version is fine, according to the FSF,
but Mozilla's trademark policy goes too far, according to the FSF, making
Mozilla-branded software non-free through their trademark policy -- Not the
software license:
"Unfortunately, such a restriction in a trademark license does make the
software nonfree. As we've said in the past, a requirement that you rename
the software when you modify it is fine -- but a requirement that you rename
it before you distribute it commercially goes too far. Changing the name of a
program should be straightforward enough for anybody who modifies the
software (and if it isn't, that can be problematic too); the same isn't true
for people who simply want to distribute it."
