Examine source code of Pomodoro Timer

{
  "manifest_version": 3,
  "name": "Pomodoro Timer",
  "version": "1.3",
  "description": "Pomodoro with tasks, goals, notifications, and sound",
  "permissions": [
    "storage",
    "notifications",
    "alarms"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "default-src 'self'; media-src 'self' blob:; script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "krishankantshastri1@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}