> Then, Mozilla uses the trademark law to help the > user identify their products (the whole objective of the trademark > law): you cannot call your application Firefox or Thunderbird nor uses > their logos. This does not raise freedom issues (you can still > exercise the four freedoms on Mozilla's software) but means that a > modified Firefox (e.g., that does not recommend any non-free software) > cannot be called Firefox not use the Firefox logo.
https://www.mozilla.org/foundation/trademarks/policy.html prohibits selling these programs with their branding. FSF considers requiring renaming programs when distributing modifications to not be a problem, since modifications already require changes to the programs, but it is too much work when distributing unmodified software (see http://lists.nongnu.org/archive/html/gnu-linux-libre/2011-08/msg00014.html for reference).
pgpOqsfZ7Hby4.pgp
Description: PGP signature
