IndexedDB and Offline Cache can get enabled, but New Identity doesn't clear them
In #3100 (closed), I made IndexedDB and the Offline Cache tied to the TBB disk pref. If you allow disk access, they're on. However, New Identity doesn't currently clear them.
The user is at least prompted before these caches are used, even if they are enabled, but we still should probably clear them on New Identity...
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information