Tor Browser will not save Exceptions in the Firefox cookie manager
Cookie exceptions in Tor Browser Bundle 3.5.2 (Torbutton 188.8.131.52) are not remembered when TBB is restarted.
Orginal bug: https://trac.torproject.org/projects/tor/ticket/4749
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information