Examine source code of Temporary Email Generator

{
  "manifest_version": 2,
  "name": "Temporary Email Generator",
  "version": "1.0",
  "description": "Create disposable emails for quick signups.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{13566619-e79c-4f8c-8128-af756c277dfe}"
    }
  }
}