Examine source code of Wikipedia Time Travel

{
  "manifest_version": 3,
  "name": "Wikipedia Time Travel",
  "version": "1.0",
  "author": "Ricardo Joaquinito",
  "description": "See how Wikipedia pages evolved over time.",
  "icons": {
    "256": "img/icons/wtt_icon_256.png",
    "1024": "img/icons/wtt_icon_1024.png"
  },
  "action": {
    "default_popup": "popup/wikipedia_time_travel.html",
    "default_icon": {
      "256": "img/icons/wtt_icon_256.png"
    },
    "theme_icons": [
      {
        "light": "img/icons/wtt_icon_light_512.png",
        "dark": "img/icons/wtt_icon_256.png",
        "size": 256
      }
    ]
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "wikipedia-time-travel@joaquinito.github.io",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage"
  ]
}