Examine source code of Print roblox page

{
  "name": "Print roblox page",
  "description": "Adds a quick print button to the browser.",
  "version": "1.2",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Print this page",
    "default_icon": "print_16x16.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{f88d5875-2294-4ac7-a005-db847a628dee}"
    }
  }
}