Examine source code of Wiktionary Search

{
  "manifest_version": 2,
  "name": "Wiktionary",
  "version": "1.4",
  "description": "Search Wiktionary from the right-click menu.",
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon@2x.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "wiktionary.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9377e45d-3040-4f1e-b069-79dc4d623ec6}"
    }
  }
}