And Mozilla sends folks our way when they want a portable version of Firefox to distribute on USB drives. We negotiated a license to use the Firefox trademarks. If you request a portable version of Firefox, ours is as official as it gets. They don't document or support it as a 'portable' implementation as it is not designed to be used as such. Well, if that's not enough for you, Mozilla calls the -profile switch a way to point to a specific profile.