Your comments

If the problem is in the disk space, then I'm afraid we will not be able to fix it, since the application does not have enough permissions to it.


Could you send screenshot with problem?

I think this is a problem in Firefox. The application does not have access to the disk and cannot know how much space is left.


We don't have such feature now.


А какую ошибку выдает в логах? 

Did you change Privacy settings of browswer?