Are there any other users on the system? If another user already has that file name under /tmp, then you'd probably get a similar error due to the sticky bit on /tmp.
Or have you set up Apparmor for Firefox by any chance? I couldn't think of any other reason why you'd get the error. If you had no write permissions on /tmp, you wouldn't even be able to log in
Are there any other users on the system? If another user already has that file name under /tmp, then you'd probably get a similar error due to the sticky bit on /tmp.
Or have you set up Apparmor for Firefox by any chance? I couldn't think of any other reason why you'd get the error. If you had no write permissions on /tmp, you wouldn't even be able to log in