Examine source code of Gonbari

{
  "manifest_version": 2,
  "name": "Gonbari",
  "version": "1.0",
  "description": "Displays selected kanji information, with 2 input options!\nEither highlight the kanji then click the toolbar button or search kanji right from the toolbar menu!\nDisplays English meaning, reading and part of speech.",
  "icons": {
    "48": "icons/Gonbari-48x48.png",
    "96": "icons/Gonbari-96x96.png"
  },
  "content_scripts": [],
  "permissions": [
    "activeTab",
    "*://jisho.org/*"
  ],
  "browser_action": {
    "default_icon": {
      "19": "icons/Gonbari-19x19.png",
      "38": "icons/Gonbari-38x38.png"
    },
    "default_title": "Gonbari",
    "default_popup": "popup/gonbari.html"
  }
}