You can find the location of the cache on the about:cache page (open that page via the location bar like a website). Only large image and media files are stored as individual files on disk. Other files are stored in a few large container files in the cache folder and not as separate files on disk. The individual files on disk have random names without a file extension for security reasons: you can't open an application or start a downloaded virus inadvertently by clicking a file in the cache folder. You can look at this extension for easier access to files in the cache. Cache Viewer: https://addons.mozilla.org/firefox/addon/2489 XP: C:\Documents and Settings\<user>\Local Settings\Application Data\Mozilla\Firefox\Profiles\<profile>\ VISTA/Windows 7: C:\Users\<user>\AppData\Local\Mozilla\Firefox\Profiles\<profile>\