Examine source code of Dogdrip Surfer

{
  "manifest_version": 2,
  "name": "Dogdrip Surfer",
  "version": "1.3resigned1",
  "description": "개드립넷에서 작동하는 플러그인 입니다. 차단 기능을 포함한 다양한 기능으로 커뮤니티 경험을 향상시킵니다.",
  "icons": {
    "48": "icons/dogdrip-48.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "activeTab",
    "storage",
    "cookies",
    "*://www.dogdrip.net/*"
  ],
  "applications": {
    "gecko": {
      "id": "dogdripsurfer@gmail.com"
    }
  },
  "web_accessible_resources": [],
  "browser_action": {
    "default_icon": "icons/dogdrip-32.png",
    "default_title": "Dogdrip Surfer"
  },
  "options_ui": {
    "page": "pages/options/options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "libs/browser-polyfill.min.js",
      "background/image_sensor.js",
      "background/style_inserter.js",
      "background/option_opener.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.dogdrip.net/*"
      ],
      "js": [
        "libs/browser-polyfill.min.js",
        "libs/arrive.min.js",
        "common/storage_guard.js",
        "content_scripts/js/block.js",
        "content_scripts/js/image_substituter.js"
      ],
      "css": [
        "content_scripts/css/block.css",
        "content_scripts/css/image_sensor.css"
      ],
      "run_at": "document_start"
    }
  ]
}