Tor Browser leaks updater temp files on OS X
When Tor Browser (4.5.3 or 5.0a4) performs a background update on OS X, it places MozUpdater/bgupdate/updater.app in a temporary directory.
If this file isn't deleted (I think the OS restarted, but this can also happen when Tor Browser crashes) OS X helpfully moves the files from the temporary directory to the trash on restart.
Several files in the .app directory contain the string "Tor Browser". This can leak the presence of Tor Browser even after it has been deleted, but I'm not sure how to fix it.