The regular Firefox program will not work on a flash/pin/thumb/USB/jump drive. However Firefox Portable will. *Firefox Portable is not produced by Mozilla but is based on the released versions of Firefox *Firefox Portable has a separate web site and separate support/help. *Firefox Portable can also be installed on your desktop hard drive along with your regular current version of Firefox; it installs in a separate folder, does not interfere with your personal settings (bookmarks, passwords, etc.) for your regular Firefox desktop installation, and keeps its add-ons separate. *Firefox Portable maintains several "legacy" versions of Firefox for use on sites that have not adopted/adapted to the current released/supported versions of Firefox '''<u>Firefox Portable</u>''' *Firefox Portable general information: http://portableapps.com/apps/internet/firefox_portable *Firefox Portable user forum: http://portableapps.com/forums/support/firefox_portable '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''