Examine source code of WordReference

{
  "manifest_version": 2,
  "name": "WordReference",
  "version": "1.2resigned1",
  "description": "Translate selected word with WordReference",
  "icons": {
    "48": "icons/icono.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{912a4a8c-b69a-440c-aeec-ae464d6e1826}"
    }
  }
}