Examine source code of Micro-Break Reminder

{
  "manifest_version": 2,
  "name": "Micro-Break Reminder",
  "version": "1.0",
  "description": "An extension that encourages users to take short breaks from their screen every hour.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/break.png"
    }
  },
  "icons": {
    "48": "icons/break.png"
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2bab65c6-e4ab-45eb-a7c5-47e4b090d350}"
    }
  }
}