Examine source code of Wiktionary Look-Up

{
  "manifest_version": 2,
  "developer": {
    "name": "Andreas Becker"
  },
  "name": "Wiktionary Look-Up",
  "description": "Look words and phrases up on Wiktionary",
  "version": "1.0",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/book.svg"
  },
  "permissions": [
    "menus",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca2248f6-0e04-403f-a7da-142a02ae942b}"
    }
  }
}