Set preferences in the user branch and unset them on uninstall

Question

I created a firefox add-on with the following lib/main.js:

const {Cc,Ci} = require(\"chrome\");
var pref = Cc[\"@mozilla.org/preferences-service;1\"].getServ         


        

Answer 1

I solved the second part (uninstall) like this, that in my main.js I added this code at the end:

exports.onUnload = function(reason) {
    //called when add-on is 
    //    uninstalled
    //    disabled
    //    shutdown
    //    upgraded
    //    downgraded
    pref.clearUserPref("network.http.response.timeout");
};

That worked on disabling and uninstalling the add-on.