The "Fireshot" add-on is distributed with this license, as seen on https://addons.mozilla.org/en-us/firefox/addon/fireshot/license/0.96: "You are free to use FireShot with any of the applications or services offered by Mozilla. All Other Rights Reserved." But that's not respected. The free version available at https://addons.mozilla.org/en-us/firefox/addon/fireshot/ is not exactly free, as it's use expires in 30 days, when the user gets a warning that says "FireShot Pro trial expired" and explains "Your 30 day trial is over and we offer you to purchase FireShot Pro." At https://addons.mozilla.org/en-us/firefox/addon/fireshot/, the creator says that "The newest Pro version (currently 0.97) is available for downloading from FireShot's home: http://screenshot-program.com/fireshot" and this new Pro version available ate the creator's site is surely a paid one, but the version distributed at Mozilla's site is self described as a free one. So the "custom" license set by the creator himself is not being respected. Users could try to enforce this license themselves, even judicially if necessary, but that is specially difficult for those living outside US (I live in Brazil, for instance). So can Mozilla enforce it's license and make the FireShot add-on distributed at mozilla.org free as it should?