.recently-used.xbel contains filenames if browser stored them to disk
A forensic analysis of the Tor Browser Bundle on Debian Linux (legacy/trac#8166 (closed)) showed that the file ~/.recently-used.xbel contains the filename of the Tor Browser Bundle tarball: tor-browser-gnu-linux-x86_64-2.3.25-5-dev-en-US.tar.gz, as well as the time and date it was added, modified, and visited.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information