Examine source code of Eye Blink Reminder

{
  "manifest_version": 2,
  "name": "Eye Blink Reminder",
  "version": "1.0",
  "description": "Reminds you to blink every 5 minutes to prevent dry eyes.",
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Eye Blink Reminder"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{779e01f8-7121-4587-b458-fffcc011d80e}"
    }
  }
}