Examine source code of BreakReminder

{
  "manifest_version": 3,
  "name": "BreakReminder",
  "version": "1.0.0",
  "description": "Simple break reminder for eye health. Follow the 20-20-20 rule: every 20 minutes, look 20 feet away for 20 seconds.",
  "icons": {
    "48": "imgs/icon-48.png",
    "96": "imgs/icon-96.png",
    "128": "imgs/icon-128.png"
  },
  "action": {
    "default_icon": {
      "48": "imgs/icon-48.png",
      "96": "imgs/icon-96.png"
    },
    "default_title": "BreakReminder",
    "default_popup": "ui/reminder.html"
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "breakreminder@health.simple",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}