Using terminal I used profile manager to successfully create a new profile (it called it Default User) and then I copied essential files like bookmarks into the new folder. FF works fine, but I can not longer create a new profile or rename the old one. In terminal the create new / rename dialogue appears, but when I try to type in a new name into the dialogue box the text does not appear in the dialogue box but appears in the terminal window. The profile folder only contains the one profile and it is correctly referenced in the .ini file.