I have a computer running Hebrew. since I upgraded to Firefox 57 - I started getting "Your Firefox profile cannot be loaded. It may be missing or inaccessible" every time I try to open Firefox I get that error message. Reinstalling Firefox doesn't work. Refreshing Firefox doesn't work. When I delete the profile directory - it open up for the first time, then when I close and reopen - error message... Creating a new profile ( the above way - open it after deleting profiles ) doesn't work. Same thing happen on my Hebrew laptop - it must be a problem with Firefox on a Windows with a Hebrew language. Please fix it.