If an image is not saved while viewing it in Tor, what happens to it when the Tor browser is shut down? Is there a copy/thumbnail saved somewhere, or a reference to it on the hard drive? Does a person have to erase anything when Tor is shut down?
If you type about:cache in Firefox you will see the following information:
Only large image and media files are stored as individual files on disk in Firefox's cache folder. Other files are stored in a few large container files and not as separate files on disk. The individual files on disk have random names without a file extension for security reasons, so you can't open an application or start a downloaded virus inadvertently by clicking a file in the cache folder.
The OfflineCache folder for portable Firefox bundled with Tor can be found at: