Examine source code of Wiktionary context search

{
  "manifest_version": 2,
  "name": "Wiktionary context search",
  "description": "Quickly lookup the highlighted text on Wiktionary",
  "version": "1.0.1",
  "developer": {
    "name": "upollo",
    "url": ""
  },
  "applications": {
    "gecko": {
      "id": "wiktionary@junglenut.org"
    }
  },
  "icons": {
    "32": "icons/wiktionary-32.png",
    "48": "icons/wiktionary-48.png",
    "96": "icons/wiktionary-96.png"
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}