Oh gosh, where to start? Did you really mean Enigma? Not Enigmail? Firefox (not Foxfire) is a browser. You are writing on the Thunderbird support forum, which is here to offer support for the Mozilla Thunderbird email client. I doubt that you can install or use Enigmail, or gpg, in Firefox. You can install Enigmail in Thunderbird, and when it is present and correct it will add items to your menus and toolbars. You will also need gpg. This in installed by default on Linux systems and generally has to be explicitly installed under Windows. You should look for the gpg4win package. When you install Enigmail, as part of settng it up it will need to discover the gpg tool set. It generally knows where to look. Are you aware that you can't usefully just create and send gpg signed or encrypted messages unless the other party, your correspondent, is using it too? You'll need their public key installed in order to encrypt messages you send. And they'll need your public key in order to send you encrypted messages, or to make sense of your digital signing. It may be that what you really need is a password protected zip utility. If you are really talking about something called Enigma then do please provide a link. This would be the first I have heard of it.