Examine source code of DC Refresher

{
  "description": "DC 페이지를 자동으로 고치고, 미리 보기를 생성합니다.",
  "version": "2.5.6",
  "name": "DCRefresher",
  "short_name": "DCRefresher",
  "manifest_version": 2,
  "permissions": [
    "https://dccon.dcinside.com/*",
    "https://gall.dcinside.com/*",
    "https://gallog.dcinside.com/*",
    "https://nstatic.dcinside.com/*",
    "https://addc.dcinside.com/*",
    "https://cdn.taboola.com/*",
    "https://t1.daumcdn.net/kas/static/*",
    "https://neon.netinsight.co.kr/*",
    "https://wcs.naver.net/*",
    "https://www.google-analytics.com/*",
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "js": [
        "refresher.bundle.js"
      ],
      "css": [
        "refresher.bundle.css"
      ],
      "matches": [
        "https://gall.dcinside.com/*",
        "https://gallog.dcinside.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval' https://cdn.jsdelivr.net; object-src 'self'",
  "icons": {
    "120": "assets/icons/logo/icon_40pt@3x.png",
    "180": "assets/icons/logo/icon_60pt@3x.png",
    "1024": "assets/icons/logo/Icon.png"
  },
  "browser_action": {
    "default_icon": {
      "128": "assets/icons/logo/icon_40pt@3x.png",
      "180": "assets/icons/logo/icon_60pt@3x.png",
      "1024": "assets/icons/logo/Icon.png"
    },
    "default_popup": "views/index.html",
    "default_title": "DCRefresher"
  },
  "options_ui": {
    "chrome_style": false,
    "page": "views/index.html"
  },
  "web_accessible_resources": [
    "assets/*",
    "popup/*"
  ],
  "commands": {
    "refreshLists": {
      "suggested_key": {
        "default": "Alt+R"
      },
      "description": "글 목록 새로고침: 새로고침"
    },
    "refreshPause": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description": "글 목록 새로고침: 일시 비활성화"
    }
  },
  "applications": {
    "gecko": {
      "id": "dcrefresher@sochiru.pw"
    }
  }
}