Examine source code of Drafter

{
  "manifest_version": 2,
  "name": "Drafter",
  "version": "0.9",
  "description": "Notebook for new tab page",
  "icons": {
    "48": "icons/feather.svg",
    "96": "icons/feather.svg"
  },
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8b0479ae-4250-43a1-aa14-e8dda11a9ec5}"
    }
  }
}