Tor Browser on OS X should not store data into the application bundle
The Tor application on OS X stores user data into its bundle (TorBrowser.app/Data/). This is bad. This causes various issues:
the Tor application can't be code sign which decreases the security. See Ticket #13251 (moved): CodeSign Tor for OS X
when installing a new version of Tor, all previous user data (bookmarks) are deleted.