When the latest version of Firefox installed on my laptop, my account being in English had no problem. I have another user account that has Greek letters. When i signed in that account and tried to open Mozilla there was the following massage "Profile Missing" "Your Firefox profile cannot be loaded. It may be missing or inaccessible" I checked the user profile and it was there and the profile.ini file had the correct settings. I then uninstalled the Mozilla Firefox from the windows uninstaller. --> Reinstalled it --> The same . I then uninstalled the Mozilla Firefox from the windows uninstaller and manually delete all data in C:/Programm Files + C:/Users/.../AppData --> Reinstalled it --> The same . A new profile was created every time but for some reason the false massage didn't go away. I did try to create a new Firefox account through my other user account (with Firefox profile manager), --> The same I changed the settings within the Profile.ini file --> The same. I do have Kaspersky Internet security 2017 installed. And i did pause protection but the same. I beleive there is smth wrong with the new version when there are accounts with Greek letters. Please help to fixthis bug.