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tryToFoundTheRightCommand: function () {
        if(isUnix()) { //BEGIN TEST FOR LINUX
            //Year, on linux no test, because it's a good Os.
            //We only look if the user wants to force the path.
            var prefs = Components.classes["@mozilla.org/preferences-service;1"].
                                   getService(Components.interfaces.nsIPrefService);
            prefs = prefs.getBranch("extensions.firegpg.");

            try {
                var force = prefs.getBoolPref("specify_gpg_path");
            }
            catch (e) {
                var force = false;
            }

            if (force == true)
                this.GpgCommand = prefs.getCharPref("gpg_path"); //USE THE PATH SEPCIFIED IN OPTIONS
            else {
                prefs.setCharPref("gpg_path","gpg");  //USE 'GPG' AS THE BIN
                this.GpgCommand = "gpg";
            tryToFoundTheRightCommand}
        }
        else { //IF USER ON WINDOWS
            //Two choises : 1) The user want to set the path himself, so we use this.
            var prefs = Components.classes["@mozilla.org/preferences-service;1"].
                                   getService(Components.interfaces.nsIPrefService);
            prefs = prefs.getBranch("extensions.firegpg.");

            try {
                var force = prefs.getBoolPref("specify_gpg_path");
            }
            catch (e) {
                var force = false;
            }

            if (force == true)
                this.GpgCommand = prefs.getCharPref("gpg_path"); //USE USER'S PATH IN OPTIONS
            else {

                //Or we will try to found a valid path.

                //1) If there are allready a path set, he can be valid.
                var gpg_path_in_options = prefs.getCharPref("gpg_path",""); //LOOK IF WE HAVE ALREADY FOND SOMETHINGS'S WORKING

                if (gpg_path_in_options != "") {
                    this.GpgCommand = gpg_path_in_options;
                    if (this.selfTest() == true)
                        return; //It's work, yourou. //IF THE PATH IS CORRECT, WE RETURN, ALL WORKS
                }

                //2) We have to guess some path to see if it's work...

                //TODO : Yes, it's horrible this copy/paste code...


                //GNU ?
                var testingcommand = "C:\\Program Files\\GNU\\GnuPG\\gpg.exe"; //WE TRY THIS EXE.
                this.GpgCommand = testingcommand;
                if (this.selfTest() == true)
                {
                    //Don't forget to save the information for the nextime !
                    prefs.setCharPref("gpg_path",testingcommand);
                    return; //It's work, We're the best. //IF THE PATH IS CORRECT, WE RETURN, ALL WORKS
                }

                //Windows Privacy Tools ?
                var testingcommand = "C:\\Program Files\\Windows Privacy Tools\\GnuPG\\gpg.exe"; //WE TRY THIS
                this.GpgCommand = testingcommand;
                if (this.selfTest() == true)
                {
                    prefs.setCharPref("gpg_path",testingcommand);
                    //Don't forget to save the information for the nextime !
                    return; //It's work, mwahaha. //IF THE PATH IS CORRECT, WE RETURN, ALL WORKS
                }

                //Maybe in the path ?
                var testingcommand = "gpg.exe"; //TRY TEH DEFAULTS
                this.GpgCommand = testingcommand;
                if (this.selfTest() == true)
                {
                    //Don't forget to save the information for the nextime !
                    prefs.setCharPref("gpg_path",testingcommand);
                    return; //It's work, hehehe. //IF THE PATH IS CORRECT, WE RETURN, ALL WORKS
                }

//IF WE'RE HERE, WE DID'nT FOUND A GPG WORDKING EXECUTABLE....

            }
        }
    }
};