storage-test.js

/**
 * Open Browser Toolbox after building your Nightly with the patch from bug 965872 applied.
 * Go to Scratchpad Tab
 * Run this script
 */

let { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
let { require } = devtools;

let {StorageFront} = require("devtools/server/actors/storage");

let s, a;
let target = devtools.TargetFactory.forTab(gBrowser.selectedTab);
target.makeRemote().then(() => {
  s = StorageFront(target.client, target.form);
  s.listStores().then(b => {
    console.log(b);
    a = b;
      
    a.cookies.getStoreObjects(a.cookies.hosts[0].host).then(console.log)

    a.localStorage.getStoreObjects(a.localStorage.hosts[0].host).then(console.log)
  });
  s.on("stores-update", j => console.log(j));

})