Examine source code of Anki Hanja Creator

{
  "manifest_version": 2,
  "name": "Anki Hanja Creator",
  "description": "Create Hanja flashcards from the information on hanja.dict.naver.com",
  "version": "0.0.1",
  "icons": {
    "96": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "permissions": [
    "tabs",
    "*://hanja.dict.naver.com/*",
    "webRequest",
    "*://localhost/"
  ],
  "browser_action": {
    "default_icon": {
      "96": "icons/icon.png"
    },
    "default_title": "Export to Anki."
  }
}