Examine source code of The Atlantic Serendipity

{
  "name": "The Atlantic Serendipity",
  "description": "See a hand-picked story from The Atlantic every time you open a new browser tab.",
  "version": "0.1.8resigned1",
  "manifest_version": 2,
  "icons": {
    "128": "atl-icon.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "applications": {
    "gecko": {
      "strict_min_version": "54.0",
      "id": "{d4c8fbc1-307b-49a4-aa47-ede90dd02384}"
    }
  }
}