Examine source code of Fact Noise

{
  "manifest_version": 3,
  "name": "Fact Noise",
  "version": "1.0",
  "description": "Every day a random, useless but interesting fact or image.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://en.wikipedia.org/"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "assets/fact-noise-icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fact-noise@example.com",
      "strict_min_version": "109.0"
    }
  }
}