Examine source code of Random Activity Picker

{
  "manifest_version": 3,
  "name": "Random Activity Picker",
  "version": "1.0",
  "description": "Randomly choose an activity: reading a book, playing a game, watching a movie, or going out.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "frierih7022001eawgr@hotmail.com"
    }
  },
  "permissions": []
}