Examine source code of Search Google + Copy

{
  "manifest_version": 2,
  "name": "Search Google + Copy",
  "version": "1.0",
  "description": "Right-click selected text to search Google and copy it to clipboard in one action.",
  "permissions": [
    "contextMenus",
    "clipboardWrite",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d5471a23-b033-462c-82b7-d640d6702261}"
    }
  }
}