Examine source code of Bluemark

{
  "description": "모바일 트위터의 북마크기능을 PC용 트위터웹 및 트윗덱에서도 사용할 수 있게 해 주는 확장기능",
  "manifest_version": 2,
  "name": "Bluemark",
  "author": "Gaeulbyul <aeiou256@gmail.com>",
  "version": "0.2.2resigned1",
  "homepage_url": "https://github.com/gaeulbyul/Bluemark",
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "https://mobile.twitter.com/*",
    "https://api.twitter.com/*",
    "https://twitter.com/*"
  ],
  "web_accessible_resources": [
    "scripts/ui-event-handler.js",
    "scripts/ui-event-handler-td.js",
    "vendor/moduleraid.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*"
      ],
      "css": [
        "styles/bluemark.css"
      ],
      "js": [
        "vendor/browser-polyfill.min.js",
        "scripts/bookmark-api.js",
        "scripts/ui-event-sender.js",
        "scripts/bluemark.js"
      ]
    },
    {
      "matches": [
        "*://tweetdeck.twitter.com/"
      ],
      "js": [
        "vendor/browser-polyfill.min.js",
        "scripts/bookmark-api.js",
        "scripts/ui-event-sender.js",
        "scripts/bluemark-td.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa985b8d-9b94-4e97-b1b7-666e6478a427}"
    }
  }
}