aStudy.js

// studyInfo.js

"use strict";
const prefSvc = require("sdk/preferences/service");
const OURPREF = 'some.newfeature.design';
const name = require("sdk/self").id;
const duration = 7;
const surveyUrl = "https://qsurvey.mozilla.com/s3/Shield-Study-Example-Survey";
const variations = {
  'strong':       () => {prefSvc.set(OURPREF, 'strong')},
  'subtle':       () => {prefSvc.set(OURPREF, 'subtle')},
  'observe-only': () => {prefSvc.set(OURPREF, 'observe-only')},
  'ut': () => {}
}
function isEligible () {
  return !prefSvc.isSet('some.pref.that.if.set.excludes.user');
}
function cleanup () {
  prefSvc.reset(OURPREF);
}
const aStudyConfig = {
  name: name,
  duration: duration,
  surveyUrl: surveyUrl,
  isEligible: isEligible,
  cleanup: cleanup,
  variations: variations,
};
module.exports = aStudyConfig;

// index.js

"use strict";
const self = require("sdk/self");
const { when: unload } = require("sdk/system/unload");
const shield = require("shield-studies-addon-utils");
const studyConfig = require("./studyConfig");
const thisStudy = new shield.Study(studyConfig);
shield.Reporter.on("report",(d)=>console.info("telemetry", d));
thisStudy.on("change",(newState)=>console.info("newState:", newState));
function orientationMsg () {
  require("sdk/panel").Panel({
    width: 400, height: 400,
    contentURL: "data:text/html,Some orientation content"
  }).show()
  shield.report({action: "orientation-showed"})
}
function ineligibleMsg () {
  require("sdk/tabs").open("data:text/html,You are ineligible, sorry!  Next time?")
}
thisStudy.once("installed", orientationMsg)
thisStudy.once("ineligible-die", ineligibleMsg)
thisStudy.startup(self.loadReason);
unload((reason) => {
  thisStudy.shutdown(reason);
})