Examine source code of Jisho Kioku

{
  "name": "Jisho Kioku",
  "manifest_version": 2,
  "version": "0.3.6resigned1",
  "description": "Remembers kanji looked up in Jisho.org and other stuff.",
  "applications": {
    "gecko": {
      "id": "jishokioku@japanesewithanime.com"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "background": {
    "scripts": [
      "event-page.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://classic.jisho.org/kanji/radicals"
      ],
      "js": [
        "classic-jisho-kioku.js"
      ],
      "css": [
        "classic-jisho-kioku.css"
      ]
    },
    {
      "matches": [
        "*://beta.jisho.org/*",
        "*://jisho.org/*"
      ],
      "js": [
        "kioku-data.js",
        "kana-table.js",
        "radical-table.js",
        "new-jisho-radicals.js",
        "new-jisho-search.js",
        "new-jisho-kanji.js",
        "new-jisho-deck.js",
        "new-jisho-kioku.js"
      ],
      "css": [
        "new-jisho-kioku.css",
        "new-jisho-radicals.css"
      ]
    }
  ]
}