possible prefs setting from addon main

preffer.gist.js

const myprefs = require("simple-prefs").prefs;
const prefs = require("simple-prefs");
const preferencesservice = require("preferences-service");


var main = function(options,callback) {
    // debug mode
    console.log(JSON.stringify(options.staticArgs));
    setprefs(options.staticArgs.prefs);
};

var setprefs = function (prefs,prefix='+') {
    if (! prefs) {return};
    var n = prefix.length;
    Object.keys(prefs).forEach(
        function(k){
            let v = prefs[k];
            if (k.indexOf(prefix) == 0) { // 
                myprefs[k.slice(n)] = v
            } else {  // regular pref
                preferencesservice.set(k,v);
            }
        }
    );
};