mkusb version 12.7.4 is in the unstable PPA now, and Firefox works for me, at least with standard Ubuntu and Lubuntu [persistent live made by dus]. Please test that it works for you too.
mkusb version 12.7.4 is in the unstable PPA now, and Firefox works for me, at least with standard Ubuntu and Lubuntu [persistent live made by dus]. Please test that it works for you too.